This technique is created with the brayer.
First Stamp your image (in this case the lighter colored images) is Versamark on glossy card stock.
Next, using the brayer, roll blocks of the lighter color where you want them.
Clean the brayer, and roll on the next color and, if desired, slightly overlap the lighter color in some instances.
Clean the brayer again, then roll the third and darkest color where you want.
Buff the entire card with a tissue and the light stamped areas will show thorugh.
Then, to continue, you can use another stamp and stamp in the medium or darker color over the image where desired. In this case I stamped ferns from the same stamp set in the green, then buff again. Cut to fit and embellish as desired.
Call me for complete details.