Some people use hue/saturation. well, ill show how its better to use color balance and show how its better looking in gfx backgrounds.
First you now make your background or open one up
Now go to Layer>New Adjustment Layer>ColorBalance
A pop-up window should come up , press ok
Now mess around un til you get the colors ya want
Now compare color balance with hue saturation
color balance
hue/saturation
Just so u guys know this is toetagger from the other gfxgamer forums
