What if you could change the color of your walls instantly, depending on your mood? This is the challenge addressed by Ron Arad’s “No Bad Colours,” a reflective light, color-changing wall panel presented at Salone in Jean Nouvel’s Project: Office for Living space. With Bluetooth, users can shift and program the wall colors, allowing them to fade slowly from blue to green, or change instantly. The technology used doesn’t require backlit panels, but rather operates with a pulse of electricity applied to a transparent fluid held between sheets of color. Check out a video here.