Looking at the pic of the yellow fabrics ... are the fabrics to the far right (to the right of the bright yellow) fabrics that you "pulled" from the selection, or do they belong to the right of the bright yellow??
The blues look great. The yellows - just trying to figure out if you are trying to put that bright yellow in the center of whole selection of yellows, or if the fabrics to the far right are out of consideration. If you are trying to center the bright yellow in the whole selection of yellows (to make it "glow" as you said), then you might want to balance it out and take some of the fabrics from the far left and add them to the right.