ΔE 15.0, fair: the same colour family, but not a straight swap. Limelight is noticeably darker, more saturated than Ratling Grime.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 15). Limelight is noticeably darker, more saturated than Ratling Grime.
The same difference applies the other way round: Ratling Grime is noticeably lighter, more muted.
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 Ratling Grime on the colour wheel See Limelight on the colour wheel
All matches: Ratling Grime equivalents · Limelight equivalents