I also agree with QuiltE & think that is the way to go or a white border. It is such a busy quilt, I feel a piano key border would be too much. It is an outstanding quilt - looks like a ton of work with lovely results.

Have you thought about not putting on a border? Just use a solid color for the binding.
Any pieced border will take away from the pieced blocks of the quilt.
If you need a border to get the quilt larger, I would use a solid border so you do not take away from the pieced blocks.
I don't think a piano key border is the answer, it will be too busy for this pattern. :)

Wow..that is so beautiful. I love it. If you add a white border....I'd still add a small border of one of the colors or a fabric that has all the colors but a very tiny border of it.

Beautiful ..I wish I could do something like this..mine is never that nice ....again beautiful .....

I like QuiltE's suggestion, too. I would also think about a very thin dark color to stop or narrow white, narrow dark, small but slightly larger outter border.

Oh, not black. Pick a favorite! This is such a lovely piece that even just a white border would be stunning. Follow your "gut instincts". On the other hand we just love giving our opinions!

WOW! What a gorgeous quilt! I don't think a piano key border would work as well as a plain border, maybe pick your favorite color in the quilt and use that? I would put on a white border, then a colored border, then maybe another white border. The quilt is colorful, and beautiful, but I think a piano border would be too busy. That is just my humble opinion. Truly a wonderful quilt you have made, either way!

Omigosh is correct - that quilt is Gorgeous!!!

IMHO - the simpler the better for the border. A small colored border to frame and a light (maybe the background) on the outside. Although I love piano pieced borders and have used them several times, I think that it would detract from the visual impact of the blocks.

If I did not do a simple border, I would try to bring some part of the design of the block outside to the border. Here is one I did. If you wanted a touch of color in the outer border you could float small squares of color in the background or in a wider border of background float a small nine patch (the size of the one on them inside your setting squares) to bring color and continuity.

Good luck - it is always so hard - but when something strikes you - you will know!!

Piano key would make it too busy. White border with maybe a corner nine patch in each of four corners. You did a beautiful job.

What a happy quilt!! It is a pleasure to see! How about doing your border in various lengths of your main colors in strips. No small pieces at all. Then you could finish it with a white border. The color strip border would be your frame and keep your eye looking into the quilt, then if you have more strips left, make the binding a happy colorful binding it would stand out against the white border. I am sure whatever you choose it will still be a beauty!