Cobalt Violet Hue vs Old Rose

How close are they?

ΔE 27.2, loose: different enough that you should pick on purpose. Old Rose is noticeably lighter, much more muted, warmer than Cobalt Violet Hue.

Can I use Old Rose instead of Cobalt Violet Hue?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 27). Old Rose is noticeably lighter, much more muted, warmer than Cobalt Violet Hue.

Can I use Cobalt Violet Hue instead of Old Rose?

The same difference applies the other way round: Cobalt Violet Hue is noticeably darker, much more saturated, cooler.

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.