The effect of colour in relation to space is very powerful. Paint a wall blue and it goes far away in the distance. Paint it red and the room shrinks. Paint it yellow and it disappears, leaving only bright sunshine.
Better than paint, coloured light transforms a space completely. Red is particularly powerful. It is such a rich, vibrant and strong colour, it hypnotises, draws you in as it comes forward, creating a somewhat claustrophobic yet mesmerising atmosphere.