Hiril Blue vs Sunrise Blue

How close are they?

ΔE 21.6, loose: different enough that you should pick on purpose. Sunrise Blue is noticeably lighter, more muted than Hiril Blue.

Can I use Sunrise Blue instead of Hiril Blue?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 22). Sunrise Blue is noticeably lighter, more muted than Hiril Blue.

Can I use Hiril Blue instead of Sunrise Blue?

The same difference applies the other way round: Hiril Blue is noticeably darker, more saturated.

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.