Setting colors to an entity in DarkRP F4 menu?

I added items in the addentities.lua like this http://i.imgur.com/Z1SGeH7.png and basically these are paint buckets, but each is obviously a different color, so how do i apply a color on a spawn-icon?
(Specifically on this menu)

bump

  1. DarkRP Thread
  2. Use Source SDK/Hammer editor to make a custom version of the model (I have no knowledge of how) or search for custom paint bucket models (TF2 Paint Buckets?)