diff --git a/config/config_reader.v b/config/config_reader.v
index d452947..3e98ffb 100644
--- a/config/config_reader.v
+++ b/config/config_reader.v
@@ -1,95 +1,103 @@
-module config
-import os
-
-pub struct RegexSetting {
-pub mut:
-	regex string
-	color int
-}
-
-pub struct Lexer {
-pub mut:
-	name string
-	regexes []RegexSetting
-	excluded_styles []int
-}
-
-pub struct Config {
-pub mut:
-	all map[string]Lexer
-}
-
-pub fn read(config_file string) {
-	content := os.read_file(config_file) or { return }
-	lines := content.split_into_lines()
-	mut lexer := Lexer{}
-	mut setting := RegexSetting{}
-	p.lexers_to_enhance = Config{}
-
-	for line in lines {
-		mut line_ := line.trim(' ')
-		if line_.starts_with(';') || line.len < 3 {  // the minimum length is something like 5=A
-			continue
-		}
-		else if line_.starts_with('[') {
-			if lexer.name != '' {
-				p.lexers_to_enhance.all[lexer.name] = lexer
-				lexer = Lexer{}  // new lexer, resets everything
-			}
-			lexer.name = line_.trim("[]").trim(' ').to_lower()
-			setting = RegexSetting{}
-		}
-		else if line_.starts_with('indicator_id') {
-			indicator_id := line_.split('=')
-			if indicator_id.len == 2 {
-				indicator_id_ := indicator_id[1].trim(' ')
-				p.indicator_id = indicator_id_.int()
-			}
-		}
-		else if line_.starts_with('offset') {
-			offset := line_.split('=')
-			if offset.len == 2 {
-				p.offset = offset[1].trim(' ').int()
-			}
-		}
-		else if line_.starts_with('regex_error_style_id') {
-			regex_error_style_id := line_.split('=')
-			if regex_error_style_id.len == 2 {
-				p.regex_error_style_id = regex_error_style_id[1].trim(' ').int()
-			}
-		}
-		else if line_.starts_with('regex_error_color') {
-			regex_error_color := line_.split('=')
-			if regex_error_color.len == 2 {
-				p.regex_error_color = regex_error_color[1].trim(' ').int()
-			}
-		}
-		else {
-			if line_.starts_with('excluded_styles') {
-				excludes := line_.split('=')
-				if excludes.len == 2 {
-					ids := excludes[1].split(',')
-					for id in ids {
-						trimmed_id := id.trim(' ')
-						lexer.excluded_styles << trimmed_id.int()
-					}
-				}
-			} else {
-				// the line starts with a color
-				split_pos := line_.index('=') or { continue }
-				if split_pos > 0 {
-					color__ := line_[0..split_pos].trim(' ')
-					setting.color = color__.replace('#', '0x').int()
-					regex := line_[split_pos..].trim_left('=').trim(' ')
-					if regex.len > 0 {
-						setting.regex = regex
-						lexer.regexes << setting
-					}
-				}
-			}
-		}
-	}
-	if lexer.name != '' {
-		p.lexers_to_enhance.all[lexer.name] = lexer
-	}
-}
+module config
+import os
+
+pub struct RegexSetting {
+pub mut:
+	regex string
+	color int
+	whitelist_styles []int
+}
+
+pub struct Lexer {
+pub mut:
+	name string
+	regexes []RegexSetting
+	excluded_styles []int
+}
+
+pub struct Config {
+pub mut:
+	all map[string]Lexer
+}
+
+pub fn read(config_file string) {
+	content := os.read_file(config_file) or { return }
+	lines := content.split_into_lines()
+	mut lexer := Lexer{}
+	mut setting := RegexSetting{}
+	p.lexers_to_enhance = Config{}
+
+	for line in lines {
+		mut line_ := line.trim(' ')
+		if line_.starts_with(';') || line.len < 3 {  // the minimum length is something like 5=A
+			continue
+		}
+		else if line_.starts_with('[') {
+			if lexer.name != '' {
+				p.lexers_to_enhance.all[lexer.name] = lexer
+				lexer = Lexer{}  // new lexer, resets everything
+			}
+			lexer.name = line_.trim("[]").trim(' ').to_lower()
+			setting = RegexSetting{}
+		}
+		else if line_.starts_with('indicator_id') {
+			indicator_id := line_.split('=')
+			if indicator_id.len == 2 {
+				indicator_id_ := indicator_id[1].trim(' ')
+				p.indicator_id = indicator_id_.int()
+			}
+		}
+		else if line_.starts_with('offset') {
+			offset := line_.split('=')
+			if offset.len == 2 {
+				p.offset = offset[1].trim(' ').int()
+			}
+		}
+		else if line_.starts_with('regex_error_style_id') {
+			regex_error_style_id := line_.split('=')
+			if regex_error_style_id.len == 2 {
+				p.regex_error_style_id = regex_error_style_id[1].trim(' ').int()
+			}
+		}
+		else if line_.starts_with('regex_error_color') {
+			regex_error_color := line_.split('=')
+			if regex_error_color.len == 2 {
+				p.regex_error_color = regex_error_color[1].trim(' ').int()
+			}
+		}
+		else {
+			if line_.starts_with('excluded_styles') {
+				excludes := line_.split('=')
+				if excludes.len == 2 {
+					ids := excludes[1].split(',')
+					for id in ids {
+						trimmed_id := id.trim(' ')
+						lexer.excluded_styles << trimmed_id.int()
+					}
+				}
+			} else {
+				// the line starts with a color
+				split_pos := line_.index('=') or { continue }
+				if split_pos > 0 {
+					color__ := line_[0..split_pos].trim(' ')
+					whitelist_str := color__.find_between('[', ']')
+					if whitelist_str.len > 0 {
+						setting.whitelist_styles = whitelist_str.split(",").map(int(it.trim_space().parse_int(10, 32) or { -1 }))
+					} else {
+						setting.whitelist_styles.clear()
+					}
+
+					setting.color = color__.replace('#', '0x').int()
+					regex := line_[split_pos..].trim_left('=').trim(' ')
+					if regex.len > 0 {
+						setting.regex = regex
+						lexer.regexes << setting
+					}
+				}
+			}
+		}
+	}
+	if lexer.name != '' {
+		p.lexers_to_enhance.all[lexer.name] = lexer
+	}
+}
diff --git a/enhance_any_lexer.v b/enhance_any_lexer.v
index 6479a8d..216be50 100644
--- a/enhance_any_lexer.v
+++ b/enhance_any_lexer.v
@@ -216,8 +216,12 @@ pub fn create_for_current_language() {
 	if ! lexer_already_defined {
 		tmpl := '
 [${current_language}]
-; color each word, 0x66ad1 is the color used, see the description above for more information on the color coding.
-0x66ad1 = \\w+
+; Each 3-digit number is styled with the color 0xff0050.
+; Matches styled by IDs 3 and 6 are recolored.
+0xff0050[3, 6] = \\d{3}
+; Each word "test" is styled with the color 0x00bb00
+; but only if the matches are not already styled by one of the IDs in excluded_styles.
+0x00bb00 = test
 ; check in the respective styler xml if the following IDs are valid
 excluded_styles = 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,20,21,22,23
 '
diff --git a/notification_handler.v b/notification_handler.v
index e4d3994..44998aa 100644
--- a/notification_handler.v
+++ b/notification_handler.v
@@ -1,162 +1,168 @@
-module npp_plugin
-
-import os
-import config
-
-fn (mut p Plugin) check_lexer() {
-	view0_id, view1_id := p.npp.get_active_buffer_ids()
-	lang_name0 := p.npp.get_language_name(usize(view0_id))
-	lang_name1 := p.npp.get_language_name(usize(view1_id))
-	p.view0_is_of_interest = lang_name0 in p.lexers_to_enhance.all
-	p.view1_is_of_interest = lang_name1 in p.lexers_to_enhance.all
-	p.lexers_to_enhance_view0 =  p.lexers_to_enhance.all[lang_name0]
-	p.lexers_to_enhance_view1 =  p.lexers_to_enhance.all[lang_name1]
-}
-
-
-fn (mut p Plugin) style(hwnd voidptr, view int) {
-	start_pos, end_pos := p.editor.get_visible_area_positions(hwnd, isize(p.offset))
-	if start_pos == end_pos || end_pos < start_pos { return }
-	p.editor.clear_visible_area(hwnd, p.indicator_id, usize(start_pos), end_pos-start_pos)
-	current_lang := if view == 0 { p.lexers_to_enhance_view0 } else { p.lexers_to_enhance_view1 }
-	for item in current_lang.regexes {
-		p.editor.scan_visible_area(
-			hwnd,
-			item,
-			current_lang.excluded_styles,
-			p.indicator_id,
-			usize(start_pos),
-			usize(end_pos))
-	}
-}
-
-pub fn (mut p Plugin) on_config_file_saved() {
-	p.initialize()
-}
-
-pub fn (mut p Plugin) on_buffer_activated(buffer_id usize) {
-	if p.npp.get_buffer_filename(buffer_id) == p.config_file {
-		p.editor.init_style(p.active_scintilla_hwnd)
-		p.buffer_is_config_file = true
-	} else {
-		p.editor.clear_regex_test(p.active_scintilla_hwnd, p.indicator_id)
-		p.buffer_is_config_file = false
-		p.check_lexer()
-	}
-}
-
-pub fn (mut p Plugin) on_language_changed(buffer_id usize) {
-	p.check_lexer()
-}
-
-fn (mut p Plugin) on_update(sci_hwnd voidptr) {
-	mut hwnd := p.editor.main_hwnd
-	mut buffer_is_of_interest := false
-	mut view := 0
-	if sci_hwnd == p.npp_data.scintilla_main_handle {
-		buffer_is_of_interest = p.view0_is_of_interest
-	} else {
-		view = 1
-		hwnd = p.editor.other_hwnd
-		buffer_is_of_interest = p.view1_is_of_interest
-	}
-	match true {
-		// keep config file check first since buffer_is_of_interest is true anyway
-		p.buffer_is_config_file { p.editor.style_config(p.active_scintilla_hwnd, p.indicator_id) }
-		buffer_is_of_interest { p.style(hwnd, view) }
-		else{}
-	}
-}
-
-pub fn (mut p Plugin) on_modified(position isize) {
-	if p.buffer_is_config_file && (! p.npp.is_single_view() ) {
-		p.editor.highlight_match(p.active_scintilla_hwnd, position, p.indicator_id)
-	}
-}
-
-pub fn (mut p Plugin) initialize() {
-	if ! os.exists(p.config_file) {
-		mut f := os.create(p.config_file) or {
-			err_msg := 'Unable to create ${p.config_file}\n${winapi_lasterr_str()}'
-			C.MessageBoxW(p.npp_data.npp_handle, err_msg.to_wide(), 'ERROR'.to_wide(), 0)
-			return
-		}
-		defer { f.close() }
-		f.write_string('
-; The configuration is stored in an ini-like syntax.
-; The global section defines the indicator ID used for styling.
-; A line starting with a semicolon is treated as a comment line, NO inline comment is supported.
-; ONLY styling of the text foreground color is supported.
-; Updates to the configuration are read when the file is saved and applied immediately
-; when the buffer of the configured lexer is reactivated.
-[global]
-; The ID of the indicator used to style the matches.
-; If there are conflicts with indicators used by Npp or other plugins, change this value.
-; The expected range is between 0 and 35; according to Scinitilla.
-indicator_id=0
-; If specifying an offset, it will affect both the start and end lines.
-; For example, if the currently visible lines range from 100 to 150 and an offset=10 is given,
-; the regular expressions are matched with the text from lines 90 to 160.
-offset=0
-; The ID of the style used to display regex errors.
-; If there are conflicts with other styles used by Npp or other plugins, change this value.
-; The expected range is between 0 and 255; according to Scinitilla.
-regex_error_style_id=30
-; The color used by the style.
-; For an explanation of how this color can be defined, see the following description of the regexes and their colors.
-regex_error_color=0x756ce0
-
-; Each configured lexer must have a section with its name,
-; (NOTE: use the menu function "Enhance current language" as it takes care of the correct naming)
-; followed by one or more lines with the syntax
-; color = regular expression.
-; A color is a number in the range 0 - 16777215.
-; The notation is either pure digits or a hex notation starting with 0x or #,
-; such as 0xff00ff or #ff00ff.
-; Please note:
-; * red goes in the lowest byte (0x0000FF)
-; * green goes in the center byte (0x00FF00)
-; * blue goes in the biggest byte (0xFF0000)
-; * this BGR order might conflict with your expectation of RGB order.
-; * see Microsoft COLORREF documentation https://docs.microsoft.com/en-us/windows/win32/gdi/colorref
-
-; The optional line of excluded_styles is expected in the form of
-; excluded_styles = 1,2,3,4,5 ...
-; The numbers refer to the style IDs used by the lexer and
-; can be taken from the file stylers.xml or USED_THEME_NAME.xml
-; and in case of UDLs the mapping is only described in the source code
-; https://github.com/notepad-plus-plus/notepad-plus-plus/blob/master/lexilla/include/SciLexer.h
-; starting from SCE_USER_STYLE_DEFAULT
-
-; The regular expression syntax is explained at
-; https://npp-user-manual.org/docs/searching/#regular-expressions
-
-; For example:
-;
-; [markdown (preinstalled)]
-; ; changes the default color - useless, just to see it works.
-; 0x66ad1 = \\w+
-; excluded_styles = 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,20,21,22,23
-
-; [python]
-; ; function parameters
-; 0x66ad1 = (?:(?:def)\\s\\w+)\\s*\\(\\K.+(?=\\):)
-; ; cls and self keywords
-; 2550 = \\b(cls|self)\\b
-; ; args and kwargs
-; 0xff33ff = (\\*|\\*\\*)\\w+
-; excluded_styles = 1,3,4,6,7,12,16,17,18,19
-'
-
-		) or { return }
-	} else {
-		config.read(p.config_file)
-	}
-	p.editor.eol_error_style = p.regex_error_style_id
-	p.editor.error_msg_color = p.regex_error_color
-	p.editor.init_indicator(p.editor.main_hwnd, usize(p.indicator_id))
-	p.editor.init_indicator(p.editor.other_hwnd, usize(p.indicator_id))
-
-	// create and send a fake nppn_bufferactivated event to the plugin
-	p.on_buffer_activated(usize(p.npp.get_current_buffer_id()))
-}
+module npp_plugin
+
+import os
+import config
+
+fn (mut p Plugin) check_lexer() {
+	view0_id, view1_id := p.npp.get_active_buffer_ids()
+	lang_name0 := p.npp.get_language_name(usize(view0_id))
+	lang_name1 := p.npp.get_language_name(usize(view1_id))
+	p.view0_is_of_interest = lang_name0 in p.lexers_to_enhance.all
+	p.view1_is_of_interest = lang_name1 in p.lexers_to_enhance.all
+	p.lexers_to_enhance_view0 =  p.lexers_to_enhance.all[lang_name0]
+	p.lexers_to_enhance_view1 =  p.lexers_to_enhance.all[lang_name1]
+}
+
+
+fn (mut p Plugin) style(hwnd voidptr, view int) {
+	start_pos, end_pos := p.editor.get_visible_area_positions(hwnd, isize(p.offset))
+	if start_pos == end_pos || end_pos < start_pos { return }
+	p.editor.clear_visible_area(hwnd, p.indicator_id, usize(start_pos), end_pos-start_pos)
+	current_lang := if view == 0 { p.lexers_to_enhance_view0 } else { p.lexers_to_enhance_view1 }
+	for item in current_lang.regexes {
+
+		p.editor.scan_visible_area(
+			hwnd,
+			item,
+			current_lang.excluded_styles,
+			p.indicator_id,
+			usize(start_pos),
+			usize(end_pos))
+	}
+}
+
+pub fn (mut p Plugin) on_config_file_saved() {
+	p.initialize()
+}
+
+pub fn (mut p Plugin) on_buffer_activated(buffer_id usize) {
+	if p.npp.get_buffer_filename(buffer_id) == p.config_file {
+		p.editor.init_style(p.active_scintilla_hwnd)
+		p.buffer_is_config_file = true
+	} else {
+		p.editor.clear_regex_test(p.active_scintilla_hwnd, p.indicator_id)
+		p.buffer_is_config_file = false
+		p.check_lexer()
+	}
+}
+
+pub fn (mut p Plugin) on_language_changed(buffer_id usize) {
+	p.check_lexer()
+}
+
+fn (mut p Plugin) on_update(sci_hwnd voidptr) {
+	mut hwnd := p.editor.main_hwnd
+	mut buffer_is_of_interest := false
+	mut view := 0
+	if sci_hwnd == p.npp_data.scintilla_main_handle {
+		buffer_is_of_interest = p.view0_is_of_interest
+	} else {
+		view = 1
+		hwnd = p.editor.other_hwnd
+		buffer_is_of_interest = p.view1_is_of_interest
+	}
+	match true {
+		// keep config file check first since buffer_is_of_interest is true anyway
+		p.buffer_is_config_file { p.editor.style_config(p.active_scintilla_hwnd, p.indicator_id) }
+		buffer_is_of_interest { p.style(hwnd, view) }
+		else{}
+	}
+}
+
+pub fn (mut p Plugin) on_modified(position isize) {
+	if p.buffer_is_config_file && (! p.npp.is_single_view() ) {
+		p.editor.highlight_match(p.active_scintilla_hwnd, position, p.indicator_id)
+	}
+}
+
+pub fn (mut p Plugin) initialize() {
+	if ! os.exists(p.config_file) {
+		mut f := os.create(p.config_file) or {
+			err_msg := 'Unable to create ${p.config_file}\n${winapi_lasterr_str()}'
+			C.MessageBoxW(p.npp_data.npp_handle, err_msg.to_wide(), 'ERROR'.to_wide(), 0)
+			return
+		}
+		defer { f.close() }
+		f.write_string('
+; The configuration is stored in an ini-like syntax.
+; The global section defines the indicator ID used for styling.
+; A line starting with a semicolon is treated as a comment line, NO inline comment is supported.
+; ONLY styling of the text foreground color is supported.
+; Updates to the configuration are read when the file is saved and applied immediately
+; when the buffer of the configured lexer is reactivated.
+[global]
+; The ID of the indicator used to style the matches.
+; If there are conflicts with indicators used by Npp or other plugins, change this value.
+; The expected range is between 0 and 35; according to Scinitilla.
+indicator_id=0
+; If specifying an offset, it will affect both the start and end lines.
+; For example, if the currently visible lines range from 100 to 150 and an offset=10 is given,
+; the regular expressions are matched with the text from lines 90 to 160.
+offset=0
+; The ID of the style used to display regex errors.
+; If there are conflicts with other styles used by Npp or other plugins, change this value.
+; The expected range is between 0 and 255; according to Scinitilla.
+regex_error_style_id=30
+; The color used by the style.
+; For an explanation of how this color can be defined, see the following description of the regexes and their colors.
+regex_error_color=0x756ce0
+
+; Each configured lexer must have a section with its name,
+; (NOTE: use the menu function "Enhance current language" as it takes care of the correct naming)
+; followed by one or more lines with the syntax
+; color[optional whitelist] = regular expression.
+; A color is a number in the range 0 - 16777215.
+; The notation is either pure digits or a hex notation starting with 0x or #,
+; such as 0xff00ff or #ff00ff.
+; Please note:
+; * red goes in the lowest byte (0x0000FF)
+; * green goes in the center byte (0x00FF00)
+; * blue goes in the biggest byte (0xFF0000)
+; * this BGR order might conflict with your expectation of RGB order.
+; * see Microsoft COLORREF documentation https://docs.microsoft.com/en-us/windows/win32/gdi/colorref
+
+; The optional whitelist is expected in the form of [1,3,16 ... ] which correspond to the style IDs of the current lexer.
+; A whitelist is only useful if an excluded_styles line has been configured
+; and means that this regex will ignore the excluded_styles list for these IDs and apply its style.
+; See excluded_styles for further information.
+
+; The optional line of excluded_styles is expected in the form of
+; excluded_styles = 1,2,3,4,5 ...
+; The numbers refer to the style IDs used by the lexer and
+; can be taken from the file stylers.xml or USED_THEME_NAME.xml
+; and in case of UDLs the mapping is only described in the source code
+; https://github.com/notepad-plus-plus/notepad-plus-plus/blob/master/lexilla/include/SciLexer.h
+; starting from SCE_USER_STYLE_DEFAULT
+
+; The regular expression syntax is explained at
+; https://npp-user-manual.org/docs/searching/#regular-expressions
+
+; For example:
+;
+; [markdown (preinstalled)]
+; ; changes the default color - useless, just to see it works.
+; 0x66ad1 = \\w+
+; excluded_styles = 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,20,21,22,23
+
+; [python]
+; ; function parameters
+; 0x66ad1 = (?:(?:def)\\s\\w+)\\s*\\(\\K.+(?=\\):)
+; ; cls and self keywords
+; 2550 = \\b(cls|self)\\b
+; ; args and kwargs
+; 0xff33ff = (\\*|\\*\\*)\\w+
+; excluded_styles = 1,3,4,6,7,12,16,17,18,19
+'
+
+		) or { return }
+	} else {
+		config.read(p.config_file)
+	}
+	p.editor.eol_error_style = p.regex_error_style_id
+	p.editor.error_msg_color = p.regex_error_color
+	p.editor.init_indicator(p.editor.main_hwnd, usize(p.indicator_id))
+	p.editor.init_indicator(p.editor.other_hwnd, usize(p.indicator_id))
+
+	// create and send a fake nppn_bufferactivated event to the plugin
+	p.on_buffer_activated(usize(p.npp.get_current_buffer_id()))
+}