Sky Blue vs True Blue

How close are they?

ΔE 15.0, fair: the same colour family, but not a straight swap. True Blue is noticeably darker, warmer than Sky Blue.

Can I use True Blue instead of Sky Blue?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 15). True Blue is noticeably darker, warmer than Sky Blue.

Can I use Sky Blue instead of True Blue?

The same difference applies the other way round: Sky Blue is noticeably lighter, 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.