sreldus

Here you will find the listed values for the ''diffusetint'' located in the vehicles.meta files. Many people have fount some but not all values (especially the  much requested ''dark smoke'') so i hope that this will bring information and all tints located in the game, to your information and you can use this as a guide when making specific vehicles spawn with a certain tint, 
Be advise Window templates would/could interfere with these. which may make them look darker or lighter in game if the selected model has a window template attached.
 
values below from none to darkest.
 
diffuseTint value="0x00FFFFFF" - None
diffuseTint value="0xAA0A0A0A" - Light Smoke
 diffuseTint value="0x54132C0B"- Dark Smoke
diffuseTint value="0xcf101010" - Limo
diffuseTint value="0xD1000000" - Pure Black
 
If anyone find other window tints as i just fount out there is more please feel free to put them here
 
other tint that's possible and another shade of dark
 0x88000000