jhladmin/node_modules/codemirror-spell-checker/debug/spell-checker.css

/**
 * codemirror-spell-checker v1.1.2
 * Copyright Next Step Webs, Inc.
 * @link https://github.com/NextStepWebs/codemirror-spell-checker
 * @license MIT
 */
.CodeMirror .cm-spell-error:not(.cm-url):not(.cm-comment):not(.cm-tag):not(.cm-word) {
    background: rgba(255, 0, 0, .15);
}