Radome vs Deep Yellow

How close are they?

ΔE 16.7, loose: different enough that you should pick on purpose. Deep Yellow is a little darker, much more saturated than Radome.

Can I use Deep Yellow instead of Radome?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 17). Deep Yellow is a little darker, much more saturated than Radome.

Can I use Radome instead of Deep Yellow?

The same difference applies the other way round: Radome is a little lighter, much more muted.

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.