have you tried to make the changes ?
<!--Gimn CUSTOM PARAMETERS FOR THE Pizza-->
<colour name="pizza_keeper" value="rgb(20,62,95)"/> <!-- dark blue -->
<colour name="pizza_defend" value="rgb(57,137,199)"/> <!-- light blue -->
<colour name="pizza_possess" value="green"/>
<colour name="pizza_attack" value="rgb(111, 5, 200)"/> <!-- purple -->
this should be what you need to edit.
if i remember correct