converts a descriptive color into an attribute value. You can use the following special strings for certain effects:
Examples:
#SHOW %color(red,magenta)
outputs 84
#COLOR %eval(%color(hi)+%color(blink)+%color(rev)+%color(blue,grey))
colors the last line in the output buffer in a flashy manner. You need the %eval in order to add up the colors into a single number.