Ombre

I experimented with a Photoshop tutorial of the same name, but developed my own technique.
Ombré means shadow (thank you anarkhya) or as the PS tutorial describes it:
"Ombre is french and means something like shaded - it describes anything that starts with one colour and then gradually fades into another."

The effect improved with each version and soon i will post a tutorial how to get the basic effects.