This post is only to explain the colors which u can choose between in the new color system.
Here are the color groups For the new system u can choose between the groups but you can't chose between the colors inside the same group(I'm not sure about the OS Staff):
OS: Gray , Orange , Purple.
Vip(Donor): White, Sky Blue , Blue , Dark Blue.
Uploader: Greenish-yellow , Yellow.
OS Staff:Peach ,Green ,Dark Yellow*between gold, yellow and brown* Pale Green,Pink ,Red.
For further information on the colors check this Name Colors Guide Thread
*Merged into Name and color guide due to exact same topic and because this post adds value to the original thread*