Joe's mom I think you are matching what Bonnie did - light on the aqua, strong yellow for the constant, and all shades of geranium.
She has something in mind for this and we don't know what it is. You spent a lot of time and thought choosing your fabric, so perhaps you should not abandon ship or change direction at this point, but stick to your plan and see where you end up! If you don't cut and sew each clue to completion it won't be hard to go back and switch out some blocks.
I too am puzzled by the HST units - they are very irritating to look at unassembled. But they mey look fabulous when done!