Welcome, geevee, I hope you decide to make the quilt!
Because your values (dark/light) are the same for all of your colors, your quilt will be very low contrast, apart from the neutral. I think it will be a lovely, soft effect, but just wanted to make sure that was your expectation.
I must have missed the uproar over the clue! I've decided to make four different sets. I'll have to go make those corrections on my print-out.