p5.js-web-editor/client/styles/components/_p5-widget-codemirror-theme.scss

// brown: #6C4D13
// black: #333
// blue: #0F9DD7
// pink: #D9328F
// gray: #999999
// dark blue: #318094
// white: #fdfdfd

//numbers
//light gray: #f4f4f4
//dark gray: #b5b5b5

$p5-light-brown: #6C4D13;
$p5-light-black: #333;
$p5-light-blue: #0F9DD7;
$p5-light-pink: #D9328F;
$p5-light-gray: #999999;
$p5-light-darkblue: #318094;
$p5-light-white: #FDFDFD;

$p5-light-lightgray: #f4f4f4;
$p5-light-darkgray: #b5b5b5;
$p5-light-selected: rgba(45, 123, 182, 25);
$p5-light-activeline: rgb(207, 207, 207);

.cm-s-p5-widget {
  background-color: $p5-light-white;
  color: $p5-light-black;
}

.cm-s-p5-widget .cm-comment {
  color: $p5-light-gray;
}

.cm-s-p5-widget .cm-def {
  color: $p5-light-blue;
}

.cm-s-p5-widget .cm-string {
  color: $p5-light-blue;
}

.cm-s-p5-widget .cm-string-2 {
  color: $p5-light-pink;
}

.cm-s-p5-widget .cm-number {
  color: $p5-light-pink;
}

.cm-s-p5-widget .cm-keyword {
  color: $p5-light-brown;
}

.cm-s-p5-widget .cm-variable {
  color: $p5-light-blue;
}

.cm-s-p5-widget .cm-variable-2 {
  color: $p5-light-black;
}

.cm-s-p5-widget .cm-property {
  color: $p5-light-black;
}

.cm-s-p5-widget .cm-atom {
  color: $p5-light-pink;
}

.cm-s-p5-widget .cm-operator {
  color: $p5-light-black;
}

.cm-s-p5-widget .cm-linenumber {
  color: $p5-light-darkgray;
}

.cm-s-p5-widget .CodeMirror-selected {
  background-color: $p5-light-selected;
}

.cm-s-p5-widget .CodeMirror-activeline-background {
  background-color: #F3F3F3;
}

.cm-s-p5-widget .CodeMirror-activeline-gutter {
  background-color: #ECECEC;
  border-right: 1px solid #ddd;
}

.cm-s-p5-widget .cm-error {
  color: #f00;
}

.cm-s-p5-widget .CodeMirror-matchingbracket {
  outline: 1px solid $p5-light-darkgray;
  color: black !important;
}

.cm-s-p5-widget .cm-qualifier {
  color: $p5-light-blue;
}

.cm-s-p5-widget .cm-tag {
  color: $p5-light-brown;
}

.cm-s-p5-widget .cm-builtin {
  color: $p5-light-blue;
}

.cm-s-p5-widget .cm-attribute {
  color: $p5-light-darkblue;
}