Bright Blue vs Light Sea Blue

How close are they?

ΔE 10.2, fair: the same colour family, but not a straight swap. Light Sea Blue is a little darker than Bright Blue.

Can I use Light Sea Blue instead of Bright Blue?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 10). Light Sea Blue is a little darker than Bright Blue.

Can I use Bright Blue instead of Light Sea Blue?

The same difference applies the other way round: Bright Blue is a little lighter.

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.