ΔE 13.3, fair: the same colour family, but not a straight swap. Light Gray FS36495 is more saturated than Ulthuan Grey.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Light Gray FS36495 is more saturated than Ulthuan Grey.
The same difference applies the other way round: Ulthuan Grey is 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 Ulthuan Grey on the colour wheel See Light Gray FS36495 on the colour wheel
All matches: Ulthuan Grey equivalents · Light Gray FS36495 equivalents