[Fj0rtizFredde]

Use colour embedding {RGB color here}.

pawn Код:

public OnPlayerText(playerid, text[])
{
  new string[128];
  format(string, sizeof(string),"{24FF0A}[%d]{FFFFFF} %s",playerid, text);
  SendPlayerMessageToAll(playerid,string);
  return 0;
}

First I turn the playerid to green then the message to white.
Edit: Changed a thing in the code.