duochrome

1. The duochrome test, a test used by opticians to refine the correction of refractive error, in which the subject is asked to compare images presented with red and green backgrounds.

2. An image composed of varying shades (grayscale) of two colors.

3. A piece of pottery decorated in two colors.

4. A color scheme consisting of only two hues.

5. Fabric that shifts between two colors, depending on the angle of light, also, by extension, something made with such fabric.

6. A fluorochrome that shows up in either of two colors, depending on the type of biological material it stains.

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