Help Needed in finding a breathable nylon

Momentum is now available from thru-hiker.com in several colors, including khaki. That might be the best solution in color you are looking for.
If the blanket will be treated with care, light silk dyed exactly to meet your preferences would be an option.

I've also searched everywhere for a breathable nylon with out any kind of DWR finish on it, and I havent found it either. If you do please post where you find it. I think momentum has DWR on it

Have you tried The RainShed?

Here is one of their fabrics that may suit your purposes:

Ultra Flare Nylon Ripstop
A lightweight 40 denier ripstop
You can make a jacket of this windbreak fabric, then carry it in your pocket while hiking.
Suggested needles: Microtex 70/10
Price/yd $6.00
Width 60″
Weight/sq yd 1.75 oz
Machine wash warm on the gentle cycle. Partially machine dry low.
Colors change. Call.

From their home page, select ‘Fabrics’ then ‘Uncoated Nylons and Polyesters’.

I think that washing fabrics that have DWR on them in regular detergents actually washes the DWR out of the fabric.