When selecting colors for a wallpaper or a sig that you are making, you have to consider whether your color match or not. When finding two or more colors that match, ur picture will appear pleasing to the eye and it's easier to like. If you want to create a sig with a render, you of course need a background. The colors of the background should match the colors of the render or the other way around. The easiest way to this is by finding complementary colors.
here's an easy way to find ur complementary color:
basically you pick the color that's on the opposite side of the color u want, or the color of your render. The color on the other side of the wheel will match as a BG. (in this wheel Red will match Cyan blue, bluish tones) The Color on the other side doen't have to be the exact color on the other side, just anything on the other side of the wheel within a small radius. These are called complements. Also u can pick colors using the Triad way, if u want three colors e.g and so on. see image below
That's right!
I found this awesome program for just this called
order number: 30056671
serial : CSS2FACB790E7B7D51A2
The colors will appear pleasing to the eye this way.
I have an example that i did here on NB a few days ago where i did just this:
U see how the peach-red matches the green-yellow? see color wheel above
Colormatching is very important when choosing colors for your pic, or else ur stuff will only not fall in taste, and you'll get nowhere..
try picturing yourself trying to decide the colors for ur walls in ur house to mach with the colors of ur roof. If ur roof is brown, then u don't want yellow walls, but perhaps something bluish.
maybe a silly example. But you get the drill. I hope this will help you as well as others when making sigs and wallpapers. 
comments, reps appreciated
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here's an easy way to find ur complementary color:
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basically you pick the color that's on the opposite side of the color u want, or the color of your render. The color on the other side of the wheel will match as a BG. (in this wheel Red will match Cyan blue, bluish tones) The Color on the other side doen't have to be the exact color on the other side, just anything on the other side of the wheel within a small radius. These are called complements. Also u can pick colors using the Triad way, if u want three colors e.g and so on. see image below
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And where have you seen these colors combined before?
You must be registered for see images
You must be registered for see images
You must be registered for see images
I found this awesome program for just this called
You must be registered for see links
order number: 30056671
serial : CSS2FACB790E7B7D51A2
The colors will appear pleasing to the eye this way.
I have an example that i did here on NB a few days ago where i did just this:
You must be registered for see images
U see how the peach-red matches the green-yellow? see color wheel above
Colormatching is very important when choosing colors for your pic, or else ur stuff will only not fall in taste, and you'll get nowhere..
comments, reps appreciated