Limewash & Limewash Effect Paint
Limewash gives you a wall with movement in it. Soft, chalky, cloudy, with light and shadow that shift as the day goes on and the colour pooling lighter and darker across the surface instead of sitting flat. It's the finish on old farmhouse walls and lime-washed European interiors, and much nicer than a modern flat matt.
It has all the eco creds and easy to use. Lime paints breathe, letting walls release moisture instead of trapping it, and they pull CO2 back out of the air as they cure. No plastic film, no sheen, just colour and a surface that moves with the light.
If your interested in lime wash effect paints the one I'd go for is Graphenstone Siena. It does everything a traditional limewash does and fixes the thing that usually puts people off about lime paints. Traditional limewash paints chalks and marks. Graphenstone adds a little natural graphene into Siena and it holds a Class 1 wet scrub rating, the top band, so you can wipe it down and put it in a hallway or a kitchen without it wearing through. It carries Cradle to Cradle Gold, an EPD and an A+ VOC rating too, which is all the eco creds you could need.
Limewash changes with the light, so try a colour on the wall itself before you commit the whole room.