Don't just let it continue! I know, I know. "But Flaun," you're saying, "I don't want to rip it all out and replace that block in the middle," or, "Ugh, do I HAVE to go back to the store and get another piece of fabric???"
I'm here to tell you to follow your instincts. Do you really want to have a project lying around that you don't love for the rest of your days, or worse yet, that you don't finish because you hate it?
I was making a class sample for SPOOL and got to the part where I tacked my EPP hexagons to the background fabric. Here's the thing, though, I hated it. It didn't make the piece sing.
Back to the shop I went and pulled several options to replace it. I narrowed to down to two colors: teal and mustard.
Neither one is a bad choice, however, in the end I went with mustard Quilters Linen because it set off the purple nicely (being on the other side of the color wheel) and because the teal is ever so slightly off.
I think it looks great!