I think most people are expecting red on the rear of a vehicle and white or yellow on the front because thats the legal convention AFAIK. I'm running ambers in front myself but also have white that can be kicked in if circumstances require. Amber (or any other color) LEDs are currently less powerful than the most powerful white LEDs but 300 lumens x 2 can still make you very conspicuous.

Contrary to some opinions stated here - hazard lights are standard on automobiles and easily recognized. The actual choice of equipment counts. Guarantee that my amber lights are brighter than the dinky white things some people are using. Visibility counts FIRST. But check your area - in some places a bike is required to have a white front light after dark.