Viper Brown vs Cadian Fleshtone

How close are they?

ΔE 6.8, close: similar, with a visible difference side by side. Cadian Fleshtone is a little lighter than Viper Brown.

Can I use Cadian Fleshtone instead of Viper Brown?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). Cadian Fleshtone is a little lighter than Viper Brown.

Can I use Viper Brown instead of Cadian Fleshtone?

The same difference applies the other way round: Viper Brown is a little darker.

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.