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 color as whatever's underneath him.
If your whole house is void of color, he can otherwise cycle through the whole color range. A small squeeze of his body when he settles on your preferred color locks it in. Surprisingly, this lamp only costs $30, which I think is a great price for something that uses a couple of white LEDs and an optical sensor to recognize and emulate the color under his belly. [ThinkGeek via Technabob]