You would go into the carcols, then find the " <color value="0xFFFF0F05"/> ".
Part of them might be red, blue, and yellow/orange
If you want check the colour of the color value,
remove the "0xFF" (or the first 4 values) and put them into a google search for "colour picker"
Red would be 0xffff0000 or ff0000
Green would be 0xff2bff00
Zeakor has a good video on it of you want: