Muddy Clay vs Deep Magenta

How close are they?

ΔE 17.4, loose: different enough that you should pick on purpose. Deep Magenta is noticeably lighter, more saturated, cooler than Muddy Clay.

Can I use Deep Magenta instead of Muddy Clay?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 17). Deep Magenta is noticeably lighter, more saturated, cooler than Muddy Clay.

Can I use Muddy Clay instead of Deep Magenta?

The same difference applies the other way round: Muddy Clay is noticeably darker, more muted, warmer.

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.