Solid Gold vs Greenish Gold

How close are they?

ΔE 17.8, loose: different enough that you should pick on purpose. Greenish Gold is a little darker, much more muted, warmer than Solid Gold.

Can I use Greenish Gold instead of Solid Gold?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 18). Greenish Gold is a little darker, much more muted, warmer than Solid Gold.

Can I use Solid Gold instead of Greenish Gold?

The same difference applies the other way round: Solid Gold is a little lighter, much 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.