I have a chip here from Acme White Lead and Color Works, Detroit:
Fawn Brown: 16 ozs Proxlin Basic Tintin Umber, No. 829 Fill to 16 oz.
4 ozs Proxlin White, # 556 Fill to 20 oz
3 1/2 oz Proxlin Basic Tinting Orange, # 811 Fill to 23 1/2 oz
1/2 oz Proxlin Basic Tinting Yellow, # 807 Fill to 24 oz.
Nothing on the Saxon Gray from that factory, sorry.
But both, from Sewall Paint & Varnish, Kansas City, MO/Dallas, TX
Fawn Brown:10 ozs # 595 White
10 ozs # 3 Red
5 3/4 oz # 597 Orange
1 1/4 oz # 940 (not specified)
Saxon Gray:15 3/4 oz # 595 White
8 1/4 oz # 7 Yellow
3 3/4 oz # 11 Black
2 1/2 oz # 3 Red
1 3/4 oz # 940 (not specified)
All are from 1931, but the mentioned colors are not the same as the ones in your F**D picture. They are darker and more brownish.