I wouldn't change a thing. The blue in the purple looks like it belongs there! It looks like the colors of the rainbow spilled out and swirled around a bit. The unpredictability of it adds to the interest. It is not just one perfect row after another. It shows your creativity. But, if you really want to get the seam ripper out and tkae it all apart, well, it is your quilt!
What do others out there think? Doesn't the blue block add to the interest and cause your eyes to move back and forworth and really take it all in?
Sally