Trollslayer Orange vs Fluor Orange

How close are they?

ΔE 7.4, close: similar, with a visible difference side by side. Fluor Orange is more muted than Trollslayer Orange. They are different kinds of paint: Citadel Trollslayer Orange is an opaque base/layer paint and Green Stuff World Fluor Orange is a fluorescent or effect paint, so they won’t behave the same on the model even where the colour is close.

Can I use Fluor Orange instead of Trollslayer Orange?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). Fluor Orange is more muted than Trollslayer Orange. They are different kinds of paint.

Can I use Trollslayer Orange instead of Fluor Orange?

The same difference applies the other way round: Trollslayer Orange is 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.