At the rear, the taillights have a new design, with a slightly darker appearance. (evo.co.uk)
Cloud droplets tend to scatter light very efficiently, so that the intensity of the solar radiation decreases with depth into the cloud, hence the grey or even sometimes dark appearance of the clouds at their base. (sciencedaily.com)
«Improvements include new automatic light / dark appearance settings, home screen syncing options, various background modes and notification support.» (mobilesyrup.com)