ΔE 9.0, close: similar, with a visible difference side by side. Signal Blue is a little lighter, warmer than Blue Liner.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Signal Blue is a little lighter, warmer than Blue Liner.
The same difference applies the other way round: Blue Liner is a little darker, cooler.
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 Blue Liner on the colour wheel See Signal Blue on the colour wheel
All matches: Blue Liner equivalents · Signal Blue equivalents