Colour-magnitude diagram of brown dwarfs. The grey points are field brown dwarfs with high surface gravity. The blue points are young or low surface gravity objects. The brown points are low-mass stars. Several directly imaged exoplanets are labelled with black text. The red arrow shows the possible positions of the candidate assuming it is at the same distance as the central stars. If confirmed, it would be one of the coolest directly imaged exoplanets.