Space Dust vs Hykey Yellow

How close are they?

ΔE 14.8, fair: the same colour family, but not a straight swap. Hykey Yellow is a little darker, much more muted than Space Dust.

Can I use Hykey Yellow instead of Space Dust?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 15). Hykey Yellow is a little darker, much more muted than Space Dust.

Can I use Space Dust instead of Hykey Yellow?

The same difference applies the other way round: Space Dust is a little lighter, 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.