ΔE 15.3, loose: different enough that you should pick on purpose. Pale Blue is noticeably lighter, warmer than Silver Grey.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 15). Pale Blue is noticeably lighter, warmer than Silver Grey.
The same difference applies the other way round: Silver Grey is noticeably darker, 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 Silver Grey on the colour wheel See Pale Blue on the colour wheel
All matches: Silver Grey equivalents · Pale Blue equivalents