ΔE 11.5, fair: the same colour family, but not a straight swap. Light Blue is a little lighter, more saturated than Bright Warm Grey.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Light Blue is a little lighter, more saturated than Bright Warm Grey.
The same difference applies the other way round: Bright Warm Grey is a little darker, more muted.
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 Bright Warm Grey on the colour wheel See Light Blue on the colour wheel
All matches: Bright Warm Grey equivalents · Light Blue equivalents