ΔE 10.9, fair: the same colour family, but not a straight swap. Oxford Blue is noticeably darker than Cloudburst Blue. They are different kinds of paint: Army Painter Cloudburst Blue is a one-coat contrast-style paint and Vallejo Oxford Blue is an opaque base/layer paint, so they won’t behave the same on the model even where the colour is close.
✓ Herrick Games paint comparison chart lists these two as equivalents.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Oxford Blue is noticeably darker than Cloudburst Blue. They are different kinds of paint.
The same difference applies the other way round: Cloudburst 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 Cloudburst Blue on the colour wheel See Oxford Blue on the colour wheel
All matches: Cloudburst Blue equivalents · Oxford Blue equivalents