ΔE 13.5, fair: the same colour family, but not a straight swap. Scarlet is more saturated, cooler than Kalahari Orange.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Scarlet is more saturated, cooler than Kalahari Orange.
The same difference applies the other way round: Kalahari Orange is more muted, 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 Kalahari Orange on the colour wheel See Scarlet on the colour wheel
All matches: Kalahari Orange equivalents · Scarlet equivalents