ColorSpaces is a simple and handy color converter. It currently supports RGB hexadecimal, decimal, and fractional conversions.
For example, enter one of these three values:
o Hexadecimal: 88ffbb
o Decimal: 136 68 187
o Fractional: 0.5333 0.2667 7.3333
and the other two representations will update live.
Once you have a color entered, you can copy each of the representations to the clipboard to paste into any other application. You can also send a detailed email about the color to someone from within the app.