During years of experimenting with 3D photography I discovered that 2 full color photos are not necessary to gain a full color 3D photo.

One photo in color, the other in black and white. Combining the two result in a full color 3D image.

The additional benefit gained is a 3D color combination with more natural colors. Many of the colors are oversaturated, but with B/W added the colors are more subdued and therefore more natural.

For CCDs and similar, only one needs to be a color chip, the other will have only a b&w sensor. This combination should also sharpen the 3D image.