ΔE 12.7, fair: the same colour family, but not a straight swap. Temple Guard Blue is noticeably darker than Ice Blue.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Temple Guard Blue is noticeably darker than Ice Blue.
The same difference applies the other way round: Ice Blue is noticeably lighter.
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 Ice Blue on the colour wheel See Temple Guard Blue on the colour wheel
All matches: Ice Blue equivalents · Temple Guard Blue equivalents