She was originally intended to have a much larger role in the show, but was slowly written out when plans changed. She was released from her contract entirely after eight episodes.
The Wikipedia article for Grace Lee Whitney has all the details (sourced from her own memoir.)
It looks like a variation of the 70's logo, with brighter colors. You can see the previous logo show forests / deserts / mountains:
Now compare the same areas with the 90's logo (according to this blog it started in 1997):
If you take a look at current google earth maps and take into consideration desertification and other factors, the colors on the Universal logo seem to match the desert/green areas on earth. Green color shows forests, deserts are red.