ΔE 3.3, very close: most people won’t see a difference side by side. Light Blue is cooler than WWI German Grey-Green Primer.
Yes, for most jobs. Very close match (ΔE 3). Light Blue is cooler than WWI German Grey-Green Primer.
The same difference applies the other way round: WWI German Grey-Green Primer is warmer.
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 WWI German Grey-Green Primer on the colour wheel See Light Blue on the colour wheel
All matches: WWI German Grey-Green Primer equivalents · Light Blue equivalents