Beautiful fabric! I have made two Surf Songs, and I think these fabrics will look really good. Remember that fabric doesn't always photograph exactly as you see it...or at least it doesn't when I use my camera. (My purple can often turn out sort of blue from my camera....) Meaning your two darks and two whites may very well be just different enough...
I just selected fabric for my 5th bargello. I am feeling quite brave, as I am not following a pattern. I am just jumping in. I made a earthtone wall hanging bargello in January and now feel that I need a bedspread to match it.
The wall hanging also didn't have a pattern, but it was small enough I was prepared to not beat myself up if I goofed it all up. Not so generous with a bed sized project.
So, start cutting the strips and go for it. Are you making the wall hanging size or the bed size??
Dina