This is a Cernit color mix of Brown and Opaque white, the original colors are on the left.
The mixes are shown with parts of Opaque white to one part of Brown, the results are on the right next to the number of parts of Opaque white.
One thing I need to tell you is that if you want to milk a color of Cernit down or if you want to make a color opaque you use Opaque White not regular white, which should really be called porcelain white, but it is not, so we deal.
At the bottom of the page is the mix of yellow, caramel, and Opaque white to make champagne or ecru-like colors.
The one on the very bottom of the page is the best ecru. It is 1 part yellow, 3 parts caramel, and 15 parts of opaque white. Notice how I wrote white on the page, pretend I wrote opaque white. ;-)
Here are some more mixes of champagne or ecru like colors.