"I've spent a lot of time looking at rocks in the desert. They look different all the time. It's the time of day, if it's sunny or shady, wet or dry, sunglasses on or off, different kind of sunglasses, how much sleep I had, blood sugar level... But each may show you something you did not see before. When I look at the images from Mars on the computer, I mess with them all the time: color balance, gamma correction, negative, histogram stretch or equalize...even mirroring makes you look at it in a different way. Geology is also an art."

Looks like you're the right person to ask about this. Could you try various brightness combos of these R,G,B filter images to get the color image to have the right color of the NASA and JPL logos:

Red filter image.
http://marsrovers.jpl.nasa.gov/gallery/all/1/p/014/1P129422108EFF0300P2549L4M1.HTML

Green filter image.
http://marsrovers.jpl.nasa.gov/gallery/all/1/p/014/1P129422179EFF0300P2549L5M1.HTML

Blue filter image.
http://marsrovers.jpl.nasa.gov/gallery/all/1/p/014/1P129422250EFF0300P2549L6M1.HTML

A problem is that I've seen versions of the NASA logo with different shades of blue:

I'm fairly sure the JPL logo should be red:

Bob Clark