What about a purple option? for the inner border and also the binding.
Ditto. This was my first thought, then thought that maybe that was too much purple.Then again can you have too much purple, violet? Very pretty quilt look forward to seeing finished quilt. BrendaK
IMHO, the darker yellow works the best. The green is OK too. Repeating the purple would not give enough contrast. I think this will be a very cheerful quilt.
They all look nice but my personal preference is the gold. I think it depends on what you want the "feel" of the quilt to be. This is a very pretty quilt.