C preprocessor colors improvement (#18671)

* C preprocessor colors improvement

Fixes #18670

* Update web_src/less/chroma/light.less

Co-authored-by: KN4CK3R <admin@oldschoolhack.me>

* typo

missing semi

* add color for #include filenames

Co-authored-by: KN4CK3R <admin@oldschoolhack.me>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>

web_src/less/chroma/dark.less

@@ -54,7 +54,7 @@
 .chroma .c1 { color: #6a737d; } /* CommentSingle */
 .chroma .cs { color: #637d; } /* CommentSpecial */
 .chroma .cp { color: #fc6; } /* CommentPreproc */
-.chroma .cpf { color: #fc6; } /* CommentPreprocFile */
+.chroma .cpf { color: #03dfff; } /* CommentPreprocFile */
 .chroma .gd { color: #fff; background-color: #5f3737; } /* GenericDeleted */
 .chroma .ge { color: #ef5; } /* GenericEmph */
 .chroma .gr { color: #f33; } /* GenericError */

web_src/less/chroma/light.less

@@ -53,8 +53,8 @@
 .chroma .cm { color: #999988; } /* CommentMultiline */
 .chroma .c1 { color: #6a737d; } /* CommentSingle */
 .chroma .cs { color: #999999; } /* CommentSpecial */
-.chroma .cp { color: #999999; } /* CommentPreproc */
-.chroma .cpf { color: #999999; } /* CommentPreprocFile */
+.chroma .cp { color: #109295; } /* CommentPreproc */
+.chroma .cpf { color: #4c4dbc; } /* CommentPreprocFile */
 .chroma .gd { color: #000000; background-color: #ffdddd; } /* GenericDeleted */
 .chroma .ge { color: #000000; } /* GenericEmph */
 .chroma .gr { color: #aa0000; } /* GenericError */