ΔE 14.8, fair: the same colour family, but not a straight swap. Tallarn Sand is noticeably darker, more muted than Bright Orange.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 15). Tallarn Sand is noticeably darker, more muted than Bright Orange.
The same difference applies the other way round: Bright Orange is noticeably lighter, more saturated.
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 Bright Orange on the colour wheel See Tallarn Sand on the colour wheel
All matches: Bright Orange equivalents · Tallarn Sand equivalents