Posted under General
I... don't know. I would have sworn it used to have a wiki definition.
post #890137 and some others use it as "A primarily monochrome/B&W image with a focused object in color" or thereabouts but it's not consistent at all.
Not the best-named tag in general really.
You're thinking of colored in which it was a black and white image that was colored.
There is spot color which deals with monochrome images with a colored object.
See:
forum #56906
forum #50566
forum #12935
I have only ever used it together with monochrome for images which are half-colored-half-monochrome such as post #822088 and post #825246.