Deathclaw Brown vs Yellow-Brown Ops

How close are they?

ΔE 18.3, loose: different enough that you should pick on purpose. Yellow-Brown Ops is a little darker, more saturated than Deathclaw Brown.

Can I use Yellow-Brown Ops instead of Deathclaw Brown?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 18). Yellow-Brown Ops is a little darker, more saturated than Deathclaw Brown.

Can I use Deathclaw Brown instead of Yellow-Brown Ops?

The same difference applies the other way round: Deathclaw Brown is a little lighter, more muted.

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.