The current default color scheme of Obi does not follow Windows standards, and is therefore sometimes confusing. For example, if one only has a few blocks recorded, it is hard to tell which block is selected.
Even if customizable color schemes will be an added feature later on, a request for a more conventional default color scheme is in place, probably using the classic and highly esteemed combination of blue and gray to indicate activity and focus;
Inactive strip: gray colors;
Inactive block:gray colors;
Active/selected strip: blue frame;
Active/selected block: darker blue frame.