Several months ago some information came out about BBM having both dark and light themes for BlackBerry 10. We can now behold that the information is true, as a screenshot from a BlackBerry 10 Dev Alpha C device shows a nice sleek dark BBM theme. What would be nice is if we will be able to switch from dark to light themes. The darker theme is known to help with battery consumption by up to 25%. Plus, I just like the darker themes better anyway.