I think your fabrics look great together, you just need some more. Can you pull a few more to go with this collection? Don't analyze what is in each fabric or try to match colors exactly, go more for how the fabrics 'feel' together.
Yes, you only have one 'light' there. Some patterns rely on contrast between lights and darks, and others don't. It depends on the pattern you will use... pick a pattern and then get the fabrics that are needed to round out your palette.
Also, you can judge your color values by squinting as you look at the fabrics. While squinting you will see the fabrics in darks and lights. The values are more clearly seen.