colors - Programmatically darken a Hex colour

Question

(Closed). This question is opinion-based. It is not currently accepting answers. question from:https://stackoverflow.com/questions/1787124/programmatically-darken-a-hex-colour

Answer 1

If you're not bothered about too much control, and just want a generally darker version of a colour, then:

col = (col & 0xfefefe) >> 1;

Is a nice quick way to halve a colour value (assuming it's packed as a byte per channel, obviously).

In the same way brighter would be:

col = (col & 0x7f7f7f) << 1;