How to convert 3-digit HTML hex colors to 6-digit flex hex colors

Question

I want to convert a three-digit hex color which is coming from HTML CSS to a six-digit hex color for Flex. Can anyone give me code to convert 3-digit hex colors to their 6-d

Answer 1

The three digit hex colors are expanded by doubling each digit (see w3 spec). So #F3A gets expanded to #FF33AA.