Could make sense because this looks closer to what I would think a Redguard look: http://theskyrimblog.com/wp-content/uploads/2011/07/Redguard1.jpg
The skin in that other pic was just way too bright.
#1 that pic you linked has never, ever been confirmed to be a Redguard. Looks like a Nord, perhaps imperial, but no dev confirmed the race AFAIK. Certainly no one ever said she was Redguard
#2. TheSkyrimBlog is a known source of inaccurate information
#3. The pic that vsions indicated was a female redguard was a completely different pic ( http://0.tqn.com/d/compactiongames/1/0/t/r/1/elder-scrolls-v-skyrim-scr06.jpg ) - and he said they decided to alter the Redguard skin tone after this pic was published.