Nanax4

Narrower sashing, all black, with pink cornerstones.

tessagin

A lighter or not so bold/neon more muted. Anxious to see the finish!

osewme

The pink is a bit too much for me. I would try auditioning more colors (like you did with the pink) until you hit on what you like. Just pull some colors out of those blocks like the green, or black or even a more subtle pink. Aren't design walls great? You can figure out what you like before sewing it all together & then later having to rip out because it's not what you really like. Stepping away to get a better look & even re-visiting it a day or two later will help.

QandE2010

I like the black with hot pink cornerstones!

Friday1961

I think it's pretty but it's also very strong. I wonder how the lighter pink would be? or a black? I just think the bold pink takes attention from your beautiful blocks.

Friday1961

I think the black makes the colors in your blocks really pop....and doesn't compete. So I'd use the black.

RST

Black, but use the pink as a flange around the outer border, just inside the binding. Or audition the hot pink for a binding.