Sharkfin Blue vs Steel (Metallic)

How close are they?

ΔE 15.3, loose: different enough that you should pick on purpose. Steel (Metallic) is a little lighter, much more muted than Sharkfin Blue.

Can I use Steel (Metallic) instead of Sharkfin Blue?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 15). Steel (Metallic) is a little lighter, much more muted than Sharkfin Blue.

Can I use Sharkfin Blue instead of Steel (Metallic)?

The same difference applies the other way round: Sharkfin Blue is a little darker, much more saturated.

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.