rryder

I think your whites are too intense. And as someone else mentioned, the original also has more frames that are a light to medium light value.

It looks to me like the original quilt has lots of value contrast, there are frames that are light, medium light, medium dark and dark, but is overall of low intensity--meaning that none of the colors used are pure colors, they have all been grayed out to some extent. Your original lime green was very intense when compared to the other greens in your quilt-- that is, it was composed of a very pure green and yellow blend, with no graying or neutralizing of the colors. The same thing looks to me to be happening with your white. You might try using either a slightly warmer white, or a very light gray instead of the pure/cool white and in addition, try to add in some more light value and medium light value frames.

Rob