Is there a way to show RGB values as 0-255 rather than percentages in the status bar? The RGB option displays floating point numbers, then there's percentatge and HSV options only in the prefs.
If you have a really good reason to do so (otherwise, just for fun) you can build the ability in a project.
Here's an example:
You can drag the RGB 0-255 group to your Favorites folder in the Motion Library for reuse.
All it is, basically, is 3 number generators (animation turned off) linked to the red, green, and blue color values and scales these to 2.55 times their value. The way Numbers works is the value will be 100 times what you might expect (you can choose different display types -- my preference was Hexadecimal -- aka HTML color).
It's not that difficult to retrain yourself to see number values as decimals or percentages. The range 0 to 255 comes from the Hexadecimal representations translated as base10 values. It really doesn't matter what the "counting" system is, the 3 values represent magnitudes and RGB color is relative to the combination of magnitudes (including saturation and brightness). If any one of the 3 values is 0, the saturation is 100%. All 3 values equal to each other, the saturation is 0%. All colors are the combination of any 2 values with the third value "contributing" to the desaturation (or 1 value and the other 2 equal to each other contributing to desaturation). The maximum of any of the 3 values determines the brightness. If you know your color wheel, that pretty much covers it.