ΔE 27.9, loose: different enough that you should pick on purpose. C.P. Cadmium Yellow Primrose is a little lighter, much more saturated than Cosmic Dust.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 28). C.P. Cadmium Yellow Primrose is a little lighter, much more saturated than Cosmic Dust.
The same difference applies the other way round: Cosmic Dust is a little darker, 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.
See Cosmic Dust on the colour wheel See C.P. Cadmium Yellow Primrose on the colour wheel
All matches: Cosmic Dust equivalents · C.P. Cadmium Yellow Primrose equivalents