I have a question, and please keep in mind that I am new to this quilting world, but... Yes, that lime green is a bit jarring when looking at four blocks together. However, depending on how you lay out the entire quilt, might they not add a pop to it? On this board I've seen some quilts with a few BRIGHT fabrics and if not overused, they add so much interest. I've come to realize there are some quilts that are better for that pop. Sometimes quilts can be very monotinous. 4-H is for the young and young at heart so the lime could give some zest to your quilt. Just use a little less of it and place it thoughtfully.