Make your image completly one color
Get a image of your choice to make it solid, if your a lazy person i suggest you do somthing small, because it can take time, however it is very easy.
Erase all of the background of your image so it will look like this above.
Go to Image > Adjustments > Gradient Map. Select anyone color and make sure that it is completly one color like mine above.
Decorate and get somthing like this, I cut this image out fast so if you take your time you will get a smoother look.
More Tutorials: 
