Rainbow Roll vs Gunmetal

How close are they?

ΔE 12.0, fair: the same colour family, but not a straight swap. Gunmetal is a little lighter than Rainbow Roll.

Can I use Gunmetal instead of Rainbow Roll?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Gunmetal is a little lighter than Rainbow Roll.

Can I use Rainbow Roll instead of Gunmetal?

The same difference applies the other way round: Rainbow Roll is a little darker.

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.