If you want Kigali in a Dulux tin, Azure Fusion 1 is your match. It lands at ΔE 2.3 from the original, which is well inside the "very close" bracket — most people won't clock the difference once it's on the wall and dry, especially across a single room.
The runner-up is Viridian Tide at ΔE 2.8. That's a touch further off — technically the threshold for "very close" is 2.5 — so on a side-by-side test patch you might catch a slight shift, but it's still a sensible alternative if you can't get hold of Azure Fusion 1 or you prefer how it reads in your light.
Both are deep, moody colours. Azure Fusion 1 sits at LRV 5.4 and Viridian Tide at LRV 6.4 — so they're genuinely dark, the sort of teal-leaning depth Kigali trades on. That low LRV means they'll drink light, so think carefully about the room. They sing in a space you want to feel enveloping — a dining room, a snug, a study, a hallway with decent artificial lighting. In a gloomy north-facing box with one small window, they'll feel like a cave unless you balance them with warm lighting and lighter trim.
Here's the honest bit though: ΔE only tells you how close the colours match under standardised conditions. It says nothing about finish and pigment behaviour. Paint & Paper Library's pigment-rich formulation handles light differently to Dulux's, and a deep teal like this can metamerise — look subtly different under daylight versus a warm bulb. So the match figure gets you in the right postcode, not necessarily the exact house.
Don't commit off a fan deck. Buy a sample of Azure Fusion 1, paint two coats on a big bit of lining paper, and move it around the room across a full day. If you're matching into existing Kigali woodwork or a feature wall, that test is non-negotiable — get it on the wall next to the original before you order the full quantity.