At least part of the answer is lighting. Try changing your lighting style-- the default Two Lights style has one of them (Light 2, I think) with a bluish gray color. When I made that one white, all appearances brightened up a lot. Brighter whites! Just like a laundry detergent commercial...
Sam B
Inventor 2012 Certified Professional
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Inventor Professional 2013 SP1.1 Update 1
Windows XP Pro 32-bit, SP3
HP EliteBook 8730w; 4 GB RAM; Core™ 2 Duo T9400 2.53 GHz; Quadro FX2700M
SpaceExplorer/SpaceNavigator NB, driver 3.7.18
still waiting for a foreshortened radius dimensioning tool in Drawing Manager