[DesiredUsername]

My vehicle colour codes are only setting as shades of black and white no matter what colour I set, any help?

[Hemnaram]

I have visited some sites where there is info regarding color coding of vehicles. Can you post some links where there tutorials are good.

[Crayder]

Regarding the OP's problem...

I bet you were using hex colors. Car colors are not hex. There is a pre set group of colors specifically for vehicles.

[SamJust]

These are color codes the guy above talked about.
https://sampwiki.blast.hk/wiki/Vehicle_Color_IDs