Ocher Orange vs Safety Orange

How close are they?

ΔE 15.1, loose: different enough that you should pick on purpose. Safety Orange is a little darker, much more saturated than Ocher Orange.

Can I use Safety Orange instead of Ocher Orange?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 15). Safety Orange is a little darker, much more saturated than Ocher Orange.

Can I use Ocher Orange instead of Safety Orange?

The same difference applies the other way round: Ocher Orange 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.