Trollblood Highlight vs IDF Sand Grey

How close are they?

ΔE 10.5, fair: the same colour family, but not a straight swap. IDF Sand Grey is noticeably darker than Trollblood Highlight.

Can I use IDF Sand Grey instead of Trollblood Highlight?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). IDF Sand Grey is noticeably darker than Trollblood Highlight.

Can I use Trollblood Highlight instead of IDF Sand Grey?

The same difference applies the other way round: Trollblood Highlight is noticeably lighter.

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.