Warm Skin Tone vs Hazard Yellow Wash

How close are they?

ΔE 38.9, loose: different enough that you should pick on purpose. Hazard Yellow Wash is noticeably lighter, more muted, cooler than Warm Skin Tone.

Can I use Hazard Yellow Wash instead of Warm Skin Tone?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 39). Hazard Yellow Wash is noticeably lighter, more muted, cooler than Warm Skin Tone.

Can I use Warm Skin Tone instead of Hazard Yellow Wash?

The same difference applies the other way round: Warm Skin Tone is noticeably darker, 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.