@edemaine/codemirror-spell-checker/debug/spell-checker.css

Tweaked spell checker for CodeMirror

/**
 * @edemaine/codemirror-spell-checker v0.0.1
 * Copyright 
 * @link https://github.com/edemaine/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);
}