uBlock/src/css/codemirror.css

.codeMirrorContainer {
    font-size: 12px;
    overflow: hidden;
}
.CodeMirror {
    border: 1px solid #ddd;
    box-sizing: border-box;
    height: 100%;
    width: 100%;
}
.cm-s-default .cm-comment {color: #777;}
.cm-staticext {color: #008;}
.cm-staticnet.cm-block {color: #800;}
.cm-staticnet.cm-allow {color: #060;}