Red!

I have absolutely no idea what I've got here. It is from a cutting taken in Marcigny, France. The flowers were orange but it has not flowered since returning to the UK! Whatever it is, I think its oily textured leaf is rather vibrant and attractive!

Update: Identified by TonyL. Herbst's bloodleaf.
Iresine herbstii.
https://www.gardenia.net/plant/iresine-herbstii