When I saw these picture, I knew I didn't want to do much to them. I just wanted to brighten them up, because at the moment they were completely dull. I knew I would paint the frames a bright color and maybe add some color to the pictures itself.
Well that was exactly what I did. I painted the frames to bring out colors that were already in the pictures. Using color theory to make the original pictures seem brighter. Then all I did to the pictures was take some soft pastels and add tints of color. I added a little orange to the yellow butterfly. On the other picture I added slight lines of blue. Also more read and orange to the butterfly. I sealed both pictures and put a varnish on the frames.