Bony Spikes vs Light Orange

How close are they?

ΔE 15.9, loose: different enough that you should pick on purpose. Light Orange is much more saturated, warmer than Bony Spikes.

Can I use Light Orange instead of Bony Spikes?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Light Orange is much more saturated, warmer than Bony Spikes.

Can I use Bony Spikes instead of Light Orange?

The same difference applies the other way round: Bony Spikes is much 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.