Auric Armour Gold vs Solid Gold

How close are they?

ΔE 32.8, loose: different enough that you should pick on purpose. Solid Gold is noticeably lighter, more saturated, cooler than Auric Armour Gold.

Can I use Solid Gold instead of Auric Armour Gold?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 33). Solid Gold is noticeably lighter, more saturated, cooler than Auric Armour Gold.

Can I use Auric Armour Gold instead of Solid Gold?

The same difference applies the other way round: Auric Armour Gold is noticeably darker, more muted, 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.