While it won't cast enough light to read by, Huey the chameleon lamp would make a great night-light. Like a true chameleon, he adapts to his environment and glows in the same colour as whatever's underneath him.
If your whole house is void of colour, he can otherwise cycle through the whole colour range. A small squeeze of his body when he settles on your preferred colour locks it in. Surprisingly, this lamp only costs $US30, which I think is a great price for something that uses a couple of white LEDs and an optical sensor to recognise and emulate the colour under his belly. [ThinkGeek via Technabob]