I initially ordered a tin of the dark slate grey patio paint. After applying I was slightly disappointed with the colour, would say it’s more of a mid grey. Ended up being about 2sqm short and couldn’t reorder for 2 weeks as it was out of stock. When I did reorder, they asked for the batch number but when it arrived it was like a light silvery grey, totally different. To rectify I asked them to send a tin of black which they did, and I mixed the two tins together and repainted the entire patio. This is exactly the colour I wanted in the first place and is a true “dark slate grey”. Warning: it reacts with water and any moisture at all in the slabs will cause it to bubble and flake after a few days so ensure it is entirely dry all the way through before applying. It is touch dry very quickly.