Earth Brown vs 7K Russian Tan

How close are they?

ΔE 14.4, fair: the same colour family, but not a straight swap. 7K Russian Tan is a little darker, more muted, cooler than Earth Brown.

Can I use 7K Russian Tan instead of Earth Brown?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). 7K Russian Tan is a little darker, more muted, cooler than Earth Brown.

Can I use Earth Brown instead of 7K Russian Tan?

The same difference applies the other way round: Earth Brown is a little lighter, more saturated, warmer.

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.