Magecast Magenta vs Indigo Sky

How close are they?

ΔE 28.0, loose: different enough that you should pick on purpose. Indigo Sky is a little lighter, much more muted, cooler than Magecast Magenta.

Can I use Indigo Sky instead of Magecast Magenta?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 28). Indigo Sky is a little lighter, much more muted, cooler than Magecast Magenta.

Can I use Magecast Magenta instead of Indigo Sky?

The same difference applies the other way round: Magecast Magenta is a little darker, much 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.