Wazdakka Red vs Rust Orange

How close are they?

ΔE 23.2, loose: different enough that you should pick on purpose. Rust Orange is noticeably lighter, more muted, warmer than Wazdakka Red.

Can I use Rust Orange instead of Wazdakka Red?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 23). Rust Orange is noticeably lighter, more muted, warmer than Wazdakka Red.

Can I use Wazdakka Red instead of Rust Orange?

The same difference applies the other way round: Wazdakka Red is noticeably darker, more saturated, 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.