[iDealGTA]

format(string, sizeof(string), "COL_LIME"Boombox Owner: %s\n"COL_RED"/setboombox\n"COL_WHITE"Type /placeboombox again to destroy it.", GetPlayerName(playerid)); //Number of Arguements

I dont think you can put COL_LIME there...... You might have to put like
SendClientMessage(......);

PS - Im Learning i aint pro :P sorry