If you want Edward Bulmer's lovely soft eau-de-nile green without the natural-paint price tag, Dulux Fresh Artichoke and Dulux Crushed Aloe are your two best bets. Both sit at ΔE 2.1 from the original, which counts as very close — most people wouldn't clock the difference on a finished wall, though a side-by-side comparison under good light would just about reveal it.
The two Dulux options are near-identical to each other as well: Fresh Artichoke has an LRV of 51, Crushed Aloe 50.8. That puts both firmly in the light-to-mid range, so they'll keep that airy, vintage-green softness Eau de Nile is loved for. I'd lean towards whichever Dulux fan deck card looks right against your own light — pull both and live with them for a day.
Now, the honest bit. Edward Bulmer paints are made with natural pigments and clay, and they shift beautifully through the day — that depth is a big part of why people fall for Eau de Nile in the first place. A modern acrylic Dulux match nails the hue but won't have quite the same chalky, layered character. So if it's the *colour* you're after, the Dulux match is genuinely excellent value. If it's the *finish and feel* you fell for, no colour match will replicate that — you'd want to stick with the real thing or look at another low-VOC clay-based option.
A practical tip: a ΔE of 2.1 means the Dulux colour is a whisker off, so if you're patching or extending existing Eau de Nile walls, don't mix brands on the same wall — the slight difference will catch the light at the join. Use the Dulux match for a fresh, whole-room job and you'll be sorted. For sheen, Dulux Heritage Velvet Matt or standard Diamond Matt both wear well in living spaces. Order testers of both Fresh Artichoke and Crushed Aloe, paint two A4 patches, and judge them morning and evening before you commit.