ΔE 14.1, fair: the same colour family, but not a straight swap. Brown RLM26 is a little lighter, more saturated, cooler than Burnt Umber Light.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Brown RLM26 is a little lighter, more saturated, cooler than Burnt Umber Light.
The same difference applies the other way round: Burnt Umber Light is a little darker, 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 Burnt Umber Light on the colour wheel See Brown RLM26 on the colour wheel
All matches: Burnt Umber Light equivalents · Brown RLM26 equivalents