Lens Flare Glow vs Primary Yellow

How close are they?

ΔE 6.1, close: similar, with a visible difference side by side. Primary Yellow is a little lighter, more muted than Lens Flare Glow. They are different kinds of paint: Army Painter Lens Flare Glow is an opaque base/layer paint and Golden Primary Yellow is an ink, glaze or transparent paint, so they won’t behave the same on the model even where the colour is close.

Can I use Primary Yellow instead of Lens Flare Glow?

Usually, if you are not matching paint already on the model. Close match (ΔE 6). Primary Yellow is a little lighter, more muted than Lens Flare Glow. They are different kinds of paint.

Can I use Lens Flare Glow instead of Primary Yellow?

The same difference applies the other way round: Lens Flare Glow is a little darker, more saturated.

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.