Instagram rolls out black and white UI to some users

Instagram seems to be testing a completely revamped UI for its app. A few users have tweeted about their app turning completely grayscale, save for the images, of course. For most parts, the new design is similar to the current one. What is different is that Instagram has dropped the blue bar at the top and the distinct square buttons at the bottom. The bar at the top is now plain white with black text and icons. The bar on the bottom loses its borders for buttons and instead has simplified iconography. This simplification of icons and monochromatic theme continues elsewhere in the...