Check if a string is a hexadecimal color

const isHexColor = (color) => /^#([0-9A-F]{3}|[0-9A-F]{4}|[0-9A-F]{6}|[0-9A-F]{8})$/i.test(color);

const isHexColor = (color: string): boolean => /^#([0-9A-F]{3}|[0-9A-F]{4}|[0-9A-F]{6}|[0-9A-F]{8})$/i.test(color);

isHexColor('#012'); // true
isHexColor('#A1B2C3'); // true
isHexColor('012'); // false
isHexColor('#GHIJKL'); // false