Mauve vs Orchid Light

How close are they?

ΔE 7.8, close: similar, with a visible difference side by side. Orchid Light is a little lighter, more saturated than Mauve.

Can I use Orchid Light instead of Mauve?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Orchid Light is a little lighter, more saturated than Mauve.

Can I use Mauve instead of Orchid Light?

The same difference applies the other way round: Mauve is a little darker, more muted.

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.