Blue wall art, and the one thing nobody warns you about.

The warning: blue dies under warm light

Most Australian homes are lit with warm bulbs in the evening, and warm light is the enemy of blue. A navy that looked crisp in daylight goes grey-brown after dark, and a sea glass blue goes almost colourless.

If the room is mostly used at night, either choose a blue with real saturation in it, or accept that the piece is going to be a daytime pleasure. Testing it matters more here than with any other colour — photograph the wall in the evening and run it through the matcher, which reads the light as it actually is.

Which blue for which room

• Navy and midnight — formal, grounding, and excellent against brass or warm timber. Heavy in a small dark room.
• Denim and mid blue — the most forgiving. Reads as a colour without committing to a style.
• Teal — green-blue, warmer than it looks, and the one that goes with terracotta rather than fighting it.
• Sky and sea glass — light and airy, and easily washed out. They need a bright room or they vanish.

What blue sits with

White and off-white always. Warm timber and rattan, which stop blue reading as cold. Brass rather than chrome. Blue against grey is the pairing to be careful with — both are cool, and together they can drain a room rather than calm it.