If it really bothers you.......then you could throw bleack over it.....Now that is my shock suggestion of the day. Wakes you up doesn't it.
I might consider putting bias tape over the seams to frame the blocks. Ot some other decorative binding. This is just an initial gut feeling. It might soften the seam lines a bit. I would consider a single fold bias tape , a rick rack or other decorative tape.