Military Shader vs Ancient Sepia

How close are they?

ΔE 41.0, loose: different enough that you should pick on purpose. Ancient Sepia is noticeably lighter, more saturated, warmer than Military Shader.

Can I use Ancient Sepia instead of Military Shader?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 41). Ancient Sepia is noticeably lighter, more saturated, warmer than Military Shader.

Can I use Military Shader instead of Ancient Sepia?

The same difference applies the other way round: Military Shader is noticeably darker, more muted, cooler.

ΔE is the colour difference between our two swatch estimates: under about 6 is close, over about 15 is loose. Real paints also differ in finish, coverage and how they thin, so test before you commit.