Changing the color of a vehicle when spawned

[HighVoltage]

I found a .VMT command that when used properly, makes only certain parts affected by the color tool.
Here is an animated Gif to show what i mean:
[IMG]http://img22.mediafire.com/59911c33c61426ec17f31d5cad95d071405f7454c442ddc0a83a9466c9d2b1da5g.jpg[/IMG]
So here is my request: I would like it so when you spawn the vehicle entity it is a random color.
This is my bad attempt:

local Category = "Left 4 Dead"

local function HandleRollercoasterAnimation( vehicle, player )
    return player:SelectWeightedSequence( ACT_GMOD_SIT_ROLLERCOASTER ) 
end

local V = {     
                // Required information
                Name = "Pickup truck", 
                Class = "prop_vehicle_jeep",
                Category = Category,

                // Optional information
                Author = "HighVoltage",
                Information = "Pickup truck from L4D2 made drivable.",
                Model = "models/props_vehicles/pickup_truck.mdl",

                // My attempts at changing color (one at a time)
                Color(0,128,0,255),
                Color (0,128,0,255),
                Color = (0,128,0,255),
                Color = "0,128,0,255",
                
                KeyValues = {
                                vehiclescript    =    "scripts/vehicles/L4D2_pickup_truck.txt"
                            }
            }

list.Set( "Vehicles", "Pickup truck", V )

I am new to lua but I have some experience in Visual Basic.

[The Mad Man]

Hi!

Could you give an example of the vmt command you used?

[HighVoltage]

The .vmt command is $blendtintbybasealpha 1.
Here is a simple explanation on how to set it up:
[QUOTE=Henry Townshend;26908892]It's super easy. Create an alpha channel in the main texture. Black = not affected by color tool. White = affected by color tool. Grey is in between, but in my opinion it looks ugly if you make it grey.

Add $blendtintbybasealpha 1 into all the vmts the model uses (except eyes/pupils/things that use transparency, as they're not affected by the color tool anyway)[/QUOTE]