ΔE 10.5, fair: the same colour family, but not a straight swap. Titan Green Pale is a little lighter, cooler than Bony Spikes. They are different kinds of paint: Army Painter Bony Spikes is an opaque base/layer paint and Golden Titan Green Pale is an ink, glaze or transparent paint, so they won’t behave the same on the model even where the colour is close.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 10). Titan Green Pale is a little lighter, cooler than Bony Spikes. They are different kinds of paint.
The same difference applies the other way round: Bony Spikes is a little darker, warmer.
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 Bony Spikes on the colour wheel See Titan Green Pale on the colour wheel
All matches: Bony Spikes equivalents · Titan Green Pale equivalents