Color codes are built up with 8 numbers. Each number symbolizes a color.
First two = I'm not sure about those
Second = Red
Third = Green
Fourth = Blue
So they look like this:
|c??RRGGBB
The numbers are taken from the hexadecimal system of numbers. There are a total of 16 numbers: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E and F. Higher number makes a brighter tone of the color. The highest number (F) on all makes the color white. The lowest (0) makes it black.
Red Code: |c00FF0000
Green Code: |c0000FF00
Blue Code: |c000000FF
Yellow Code: |c00FFFF00
The one used to display hotkeys in WE is |cffffcc00