AFAIK only
announce "<text>",<flag>{,<fontColor>{,<fontType>{,<fontSize>{,<fontAlign>{,<fontY>}}}}};
mapannounce "<map name>","<text>",<flag>{,<fontColor>{,<fontType>{,<fontSize>{,<fontAlign>{,<fontY>}}}}}};
areaannounce "<map name>",<x1>,<y1>,<x2>,<y2>,"<text>",<flag>{,<fontColor>{,<fontType>{,<fontSize>{,<fontAlign>{,<fontY>}}}}}};
can have your desire colors however it also shows on the the top of the screen besides from the chat window...