Convert RGBA values to hex color code

Question

I have some sliders in my application that allows the user to change ARGB colors, however I need to convert these values to a hex value like 0xff000000, which is solid black

Answer 1

The problem is that you are including alpha values. So your maximum color code is #FFFFFFFF (8 digits).

The method Integer.parseInt will let you parse value from -0x80000000 to 0x7FFFFFFF. In order to get your value 0xCC999999 from it, you would have to negate the value and input -0x33666667 - which is of course not useful at all.

The clunky but stable workaround is using Long.

(int) Long.parseLong(text, 16)

Answer 2

The Color parameters must be floats between 1f and 0f. So this is a valid color:

int color = toHex(new Color(1f, 1f, 1f, 1f));

Which is white.