Good news, mate — you don't have to pay the Heritage premium for this one. Dulux Heritage China White has a perfect twin sitting in Dulux's standard range: Chiffon White 4 matches it at ΔE 0 with an LRV of 85.9. That's not "close enough", that's the same colour to the human eye, just in a cheaper tin and a wider spread of finishes.
Why the price gap? The Heritage line carries a richer, more refined base and a heavier marketing story, but the *colour* is what it is. If you've fallen for China White's soft, barely-there warm white, you're paying for the label, not the pigment.
If you'd rather not buy Dulux at all, Crown Best China is also a ΔE 0 match (LRV 85.9 again) — genuinely indistinguishable on the wall, and Crown's emulsion is a solid, hard-wearing trade product that decorators reach for daily.
Want something with a touch more character? COAT Me Time lands at ΔE 1.3 (LRV 83.7), so a hair deeper and softer, but still very much in the same family. COAT's matt emulsion is low-VOC, washable and genuinely lovely to roll out — worth it if you care about the finish quality as much as the saving.
The one thing to watch: a ΔE 0 match is measured under controlled lighting on the same sheen. Different brands formulate their bases differently, so a perfect colour match in matt won't necessarily look identical in eggshell or soft sheen. Always buy a sample pot and brush it out next to your existing reference before you commit a whole room.
My steer: go Chiffon White 4 if you want the easiest like-for-like swap, Best China if you prefer Crown's durability, or Me Time if finish quality and a slightly softer warmth matter to you. All three save you money over the Heritage tin without compromising the look.