The minimap on mapgen maps uses different colors in an effort to improve the contrast, to make it easier to read the minimap. Do you like that or would you prefer if they used the same color as all other maps?
For reference this is a gpg map:
and this is a mapgen map
Further comparison can be found here https://forum.faforever.com/topic/6874/opinions-on-minimap-colors-wanted/14