Phoenix Flames vs Mustard Yellow

How close are they?

ΔE 12.9, fair: the same colour family, but not a straight swap. Mustard Yellow is noticeably darker than Phoenix Flames.

Can I use Mustard Yellow instead of Phoenix Flames?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Mustard Yellow is noticeably darker than Phoenix Flames.

Can I use Phoenix Flames instead of Mustard Yellow?

The same difference applies the other way round: Phoenix Flames is noticeably lighter.

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.