@atlaskit/stylelint-design-system/dist/es2019/utils/is-hex-color.js

Stylelint plugin for use with the Atlassian Design System.

export const isHexColor = value => /^#([0-9a-f]{3,4}|[0-9a-f]{6}|[0-9a-f]{8})$/i.test(value);