Star Blue vs Twilight Sky

How close are they?

ΔE 11.7, fair: the same colour family, but not a straight swap. Twilight Sky is a little lighter, more saturated, warmer than Star Blue.

Can I use Twilight Sky instead of Star Blue?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Twilight Sky is a little lighter, more saturated, warmer than Star Blue.

Can I use Star Blue instead of Twilight Sky?

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