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I'm looking for red and green colors which are still really distinct when printed as a grayscale image. My current color values (224,133,0 and 168,181,10) are really industuingable on paper.

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If they are indistinguishable, then try varying them and see how they come out. Just use photoshop's desaturate filter once in a while to get an idea of how they will look. – kumar_harsh Aug 4 '14 at 5:50

Any variation in brightness/saturation of colors will be distinguishable in greyscale. I.E. a bright red and a darker green. Or a dark red/burgundy and a bright green.

enter image description here

But really the best red green in greyscale is this one....

enter image description here

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Nice answer, do you happen know any good RGB values? – compie Aug 1 '14 at 8:44
You seriously need me to decide exactly what red and exactly what green for you? I can't do that without knowing much more about the project in general. – Scott Aug 1 '14 at 8:59
Haha, yes I'm super lazy and the exact colors don't matter much. I will use the colors from your example image. BTW, I'm a programmer, the graphics guy came up with the current colors... – compie Aug 4 '14 at 10:34

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