[Skimmer]

For stats on website, you want look players stats from your website, right?
Save the stats from any player, in mysql database and call it from your website, using PHP.

For your command /yellow, just use the function SetPlayerColor.

pawn Код:

if (strcmp("/yellow", cmdtext, true, 10) == 0)
{
    SetPlayerColor(playerid, color);
    return 1;
}

EDIT: Here is a link, for SA-MP Color Picker.