the first 6 characters after the x are the RGB pairs of values in hexadecimal, so you just turn the green value to the max, which is FF. If you wanted red it would be 0xFF0000FF, and if you wanted a particular shade of cyan it would be 0x10E9F6FF
I think the last 2 characters are the alpha channel, which don't really need to be changed, but not sure what the 0x does.
Edited by quake is potat at 18:08 CDT, 31 October 2013