Function isHexColor

Validates whether a given string is a valid hexadecimal color code. The function ensures that the input string matches the format of either a 3, 4, 6, or 8-digit hexadecimal number, optionally prefixed with a #.

Example

console.log(isHexColor('#ff0000')); // true
console.log(isHexColor('#FFF'));    // true
console.log(isHexColor('#12345678')); // true
console.log(isHexColor('ff0000'));   // true
console.log(isHexColor('#12345'));   // false
console.log(isHexColor('#gggggg'));  // false
console.log(isHexColor(null));       // false
console.log(isHexColor(123 as any)); // false
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