Blue

From xat wiki

Color any "yellow" smiley blue. To make a smiley blue, add #b at the end of a smiley code, e.g. (d#b). If you have multiple color powers, you can create custom colored smilies.

Examples

a_(d*b)_40?.png
a_(smirk*b)_40?.png
a_(redface*b)_40?.png