The PC versions of Sierra
's games often supported 16 colors on CGA with a composite monitor
with an RGB monitor. Although the 16 colors available on CGA composite displays are not the same as those available with EGA and Tandy, they are close enough so the RGB colors can be mapped to a reasonably similar composite color. However almost all of Sierra's games reverse red and purple on composite displays for some reason (what's red in RGB displays as purple on composite, and purple in RGB displays red on composite). Mickey's Space Adventure
is unique in that this reversal turns out to be an advantage for the composite mode; Mickey's shirt and the planet Mars display correctly as red in CGA composite mode but purple in Tandy mode.