I realize this may sound like a stupid thing to worry about but I'm really into graphics and I notice things like this
 
The problem is all of my Icons are very low-quality. They look like they are in low color-depth mode. However, I enabled the option "icons use all possible colors" in the display properties.
 
Can someone help me out and tell me how to get them looking good? I dont understand whats going on and I've been at this for hours thanks!