Duocolor

If daylight is present, the resulting pictures may show a duocolor effect—the highlights and middle tones will be correctly rendered but the shadows may reflect the daylight and photograph quite blue.

Source: wiktionary

A duocolor scheme, a combination of wine and light tan, is used as a decorative effect.

Source: wiktionary

[…] correct a lack of color contrast balance in a slide or print material, to lighten the shadow areas of a print, or to obtain duocolor or monochrome effects.

Source: wiktionary

Oh come on! Saying you can't make a tricolor deck without multilands was bad enough, but now you're saying you can't even make a reliable duocolor deck? _Just how bad are you_ at deck construction?

Source: wiktionary