I love scrappy quilts, maybe some different shades of all these colors plus white or off-white would work. That easy star pattern that they are doing on this site in the stars of the month looks really easy. If those are the colors that she wants, she will like it. I think I would have a hard time working with those colors, too. Sorry that is not much help! Can you take out either the green or the red? It think that is what is throwing me off... I can see green and blue, or red and blue together...
While I was searching, I see some others posted ideas. I love the Hope of Hartford block, too, glad that she changed her mind!