Violets

I do not remember exactly, but must be four to five years ago that I purchased a plant with few violets as weeds in the container. They were so dark blue that I didn't clean off the surface of the container. After years they have migrated as weeds in some locations in the garden, freely cross breeding with the usual forms of Viola tricolor present in my region. The following pictures show some of the nice results.

Top: "originally purchased" violet.