foreground (|XX)                    background (|BX)
   ====================================      ======================
   00 black            08 dark grey          B0 black
   01 blue             09 light blue         B1 blue
   02 green            10 light green        B2 green
   03 cyan             11 light cyan         B3 cyan
   04 red              12 light red          B4 red
   05 magenta          13 light magenta      B5 magenta
   06 brown            14 yellow             B6 brown
   07 grey             15 white              B7 grey