ΔE 24.0, loose: different enough that you should pick on purpose. Russ. AF Light Blue is noticeably lighter, much more muted, warmer than Meredius Blue.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 24). Russ. AF Light Blue is noticeably lighter, much more muted, warmer than Meredius Blue.
The same difference applies the other way round: Meredius Blue 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.
See Meredius Blue on the colour wheel See Russ. AF Light Blue on the colour wheel
All matches: Meredius Blue equivalents · Russ. AF Light Blue equivalents