Count of Tuscany vs Fulgrim Pink

How close are they?

ΔE 35.2, loose: different enough that you should pick on purpose. Fulgrim Pink is a little lighter, more muted, cooler than Count of Tuscany.

Can I use Fulgrim Pink instead of Count of Tuscany?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 35). Fulgrim Pink is a little lighter, more muted, cooler than Count of Tuscany.

Can I use Count of Tuscany instead of Fulgrim Pink?

The same difference applies the other way round: Count of Tuscany is a little darker, more saturated, 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.