Yes, Wondra is off white. I found this on the net…
Gold Medal Wondra instantized flour introduced - It was an all-purpose flour in a revolutionary new granular form. It was made by a process of agglomeration of small flour particles to make a more uniform instantized product. There were no chemical additions in the processing and the baking characteristics of all-purpose flour were not changed. Wondra had the same nutritional food value as any other enriched flour and was made of a specially selected blend of wheats to make it suitable for all types of baking. Wondra. was particularly useful for making lump-free sauces and gravies because it dispersed instantly in cold liquids. It poured freely and evenly and measured the same, cup after cup, because of its controlled uniformity. Wondra was also dust-free. (The name was later changed to Wondra Quick- Mixing Flour.)
The process of producing a free-flowing, dust-free powder from substances such as dried milk powder and wheat flour, by moistening the powder with droplets of water and then redrying in a stream of air. The resulting agglomerates can readily be wetted.