Kim Kardashian -- Hits the Bottle ... Of Hair Dye, HARD (PHOTO)

Kim Kardashian said hey baby, take a walk on the bright side -- debuting an ultra blonde hairdo in Paris.

Kim and Kanye West walked out of Le Royal Monceau Hotel, and -- it might just be the new 'do -- but she had a disturbingly distant look on her face ... maybe thinking if change is a good thing.