Mid DAK Sand vs Yellow Oxide

How close are they?

ΔE 18.0, loose: different enough that you should pick on purpose. Yellow Oxide is a little lighter, much more saturated than Mid DAK Sand.

Can I use Yellow Oxide instead of Mid DAK Sand?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 18). Yellow Oxide is a little lighter, much more saturated than Mid DAK Sand.

Can I use Mid DAK Sand instead of Yellow Oxide?

The same difference applies the other way round: Mid DAK Sand 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.