Idea to fix the pinkness: With the help of a camera, measure color temperature and tint, and adjust the light in a feedback loop.

Web interfaces to change the light color:

• Helios

• Helios 2 (alternative UI)

For more information, read about Lionello Lunesu’s project WiFi Lights on pages 82 to 87 in The Field Guide to Hacking and the dsl-lights repo