Mars, the Planet of Illusion
Where nothing is ever what it appears to be and there is always someone who has written a paper that disputes what your lying eyes show you and there are always scholars eager to yield to this authority.
Try the cut and paste test that Nick suggests with White Rock. You will find to your delight that White Rock is actually significantly brighter/lighter than light-colored regions, as close to "white" as anything gets on Mars.
Go ahead. Try it.
;-)
Cheers, BFelix