coloring question

hi everybody

I have a few question about colorings...

how can I make this kind of coloring:
by glassballerina
by glassballerina
and also I would like to know who I can get so clear icons, like the first icon.



and this coloring:
by einkongraphia
by einkongraphia

and last one is this:
by exclusion_lair

I hope you can help me? ;)