Well, html color codes ftw, which means any color should display, so if you wanted to use an ansii text generated sign and have color you can do that too.
\#000000\ - 000000 - Black
\#ffffff\ - ffffff - White
\#999999\ - 999999 - Gray
\#663300\ - 663300 - Brown
\#cc9966\ - cc9966 - Tan
\#dd0000\ - dd0000 - Red
\#cc00ff\ - cc00ff - Fuscia
\#ff6699\ - ff6699 - Pink
\#ff6600\ - ff6600 - Orange
\#ff9900\ - ff9900 - Yellow/Orange
\#FFFF00\ - ffff00 - Yellow
\#ffcc00\ - ffcc00 - Light Yellow
\#006600\ - 006600 - Dark Green
\#00ff00\ - 00ff00 - Green
\#33ff99\ - 33ff99 - Sea Green
\#000099\ - 000099 - Dark Blue
\#6699ff\ - 6699ff - Pale Blue
\#0000ff\ - 0000ff - Blue
\#336699\ - 336699 - Gray Blue
\#330066\ - 330066 - Purple
\#9966FF\ - 9966FF - Lavender
\#00FFFF\ - 00FFFF - Aqua
\#008080\ - 008080 - Teal