HTC One was initially launched in Black and Silver colors back in March this year. Later on we got Ruby Red exclusive to Sprint and Glamour Red - selling only in the UK, while a few days ago at the IFA HTC added yet another flavors to the One lineup - Vivid Blue exclusive to BestBuy. It seems though HTC is prepping another paintjob for the HTC One, as testified by a couple of leaked...
Source: http://www.gsmarena.com/htc_one_goldcolored_shell_shows_its_face_in_china-news-6791.php