keiiii
That's a very broad question...
To get started, think about the light sources. Does the picture have a prominent light source? Sunset pictures are a good example. If there's a sunset in your picture, chances are, most of your picture is going to be orangeish.
Also, especially important if you're coloring digitally -- a common mistake is to use the brightest blue possible to color blue things, the brightest red to color red things, etc. Avoid using extremely bright, saturated colors. They have their places (I use them a lot in my art, actually) but if you don't know what you're doing, saturated colors will look garish and ugly.
It's hard to give specific advice without having seen your art. sweatdrop
To get started, think about the light sources. Does the picture have a prominent light source? Sunset pictures are a good example. If there's a sunset in your picture, chances are, most of your picture is going to be orangeish.
Also, especially important if you're coloring digitally -- a common mistake is to use the brightest blue possible to color blue things, the brightest red to color red things, etc. Avoid using extremely bright, saturated colors. They have their places (I use them a lot in my art, actually) but if you don't know what you're doing, saturated colors will look garish and ugly.
It's hard to give specific advice without having seen your art. sweatdrop
Beware of the Procrastinat0r!!