[duotone theme] Improve contrast on comment tokens

Closes #7087

Author: marijnh

theme/duotone-dark.css

@@ -26,7 +26,7 @@ CodeMirror template by Jan T. Sott (https://github.com/idleberg), adapted by Bra
 
 .cm-s-duotone-dark span.cm-variable-2, .cm-s-duotone-dark span.cm-variable-3, .cm-s-duotone-dark span.cm-type, .cm-s-duotone-dark span.cm-string-2, .cm-s-duotone-dark span.cm-url { color: #7a63ee; }
 .cm-s-duotone-dark span.cm-def, .cm-s-duotone-dark span.cm-tag, .cm-s-duotone-dark span.cm-builtin, .cm-s-duotone-dark span.cm-qualifier, .cm-s-duotone-dark span.cm-header, .cm-s-duotone-dark span.cm-em { color: #eeebff; }
-.cm-s-duotone-dark span.cm-bracket, .cm-s-duotone-dark span.cm-comment { color: #6c6783; }
+.cm-s-duotone-dark span.cm-bracket, .cm-s-duotone-dark span.cm-comment { color: #a7a5b2; }
 
 /* using #f00 red for errors, don't think any of the colorscheme variables will stand out enough, ... maybe by giving it a background-color ... */
 .cm-s-duotone-dark span.cm-error, .cm-s-duotone-dark span.cm-invalidchar { color: #f00; }

theme/duotone-light.css

@@ -25,7 +25,7 @@ CodeMirror template by Jan T. Sott (https://github.com/idleberg), adapted by Bra
 
 .cm-s-duotone-light span.cm-variable-2, .cm-s-duotone-light span.cm-variable-3, .cm-s-duotone-light span.cm-type, .cm-s-duotone-light span.cm-string-2, .cm-s-duotone-light span.cm-url { color: #896724; }
 .cm-s-duotone-light span.cm-def, .cm-s-duotone-light span.cm-tag, .cm-s-duotone-light span.cm-builtin, .cm-s-duotone-light span.cm-qualifier, .cm-s-duotone-light span.cm-header, .cm-s-duotone-light span.cm-em { color: #2d2006; }
-.cm-s-duotone-light span.cm-bracket, .cm-s-duotone-light span.cm-comment { color: #b6ad9a; }
+.cm-s-duotone-light span.cm-bracket, .cm-s-duotone-light span.cm-comment { color: #6f6e6a; }
 
 /* using #f00 red for errors, don't think any of the colorscheme variables will stand out enough, ... maybe by giving it a background-color ... */
 /* .cm-s-duotone-light span.cm-error { background: #896724; color: #728fcb; } */