Wraithbone vs Aged White

How close are they?

ΔE 7.8, close: similar, with a visible difference side by side. Aged White is a little lighter, more saturated, warmer than Wraithbone.

Can I use Aged White instead of Wraithbone?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Aged White is a little lighter, more saturated, warmer than Wraithbone.

Can I use Wraithbone instead of Aged White?

The same difference applies the other way round: Wraithbone is a little darker, more muted, 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.