Check if a string is a hexadecimal color

JavaScript

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

TypeScript

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

Examples

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