Hi Kirsten, it appears as though the honey or wax is dark, however the dark color mainly comes from a buildup of cocoons left behind after bees have hatched. Also wax will darken over time because of foot traffic over it. You’ll see that when I finally put my tree hive video up. The large dark area at the entrance of the hive after a lot of years of bees landing on it. I particularly got Wilma to focus the camera on that area.
Those photos are a bit fuzzy, but it looks as though those open cells only contain fresh unripe honey.
PS. At the top corners of those frames you’ll see how light in color it is. That’s because those areas have only been used by the bees to store honey. Therefore there is no cocoons left behind to darken the color of the wax. The honey in the dark area is more than likely the same color as the honey in the light colored areas.