[Niko_boy]

inside OnPlayerSpawn(playerid)
use:

pawn Код:

switch(GetPlayerSkinID(playerid))
{
case /* first class i.e. skin id */: { SetPlayerColour(playerid, /*color code for first skin class */); }
case /* second class */: { SetPlayerColour(playerid, /*color code for first second class */); }
case /* third class */: { SetPlayerColour(playerid, /*color code for first third class */); }
}

EDIT:fixed