The side panels feature a wave-like LED light system, they are very heavy and quite hard to remove.
One of the minor imperfections I noticed while inspecting the case is that paint was missing on the corners of the side panels. When contacted about this issue the company said this is due to the fact that these corners are cut off after being painted and before being folded. BitFenix says they will switch these steps around at the factory level, to ensure that retail versions will not have this issue.
Just like the rest of the case, the rear has a dark grey color. The two side panels are secured with thumb screws, the power supply is mounted in the bottom area and the PCI slot covers are perforated to enhance airflow.
Two keys for the BitFenix S3 system are attached to the honeycomb rear fan grill and there are four pre-drilled holes for watercooling tubing and/or the cables for the front USB 3.0 ports.
A large part of the top panel is perforated to let the hot air out.
The right side panel features the same LED light system as its counterpart on the other side of the case. The BitFenix Colossus is one of the few cases the employs such a large light system on the exterior of the case.
I've almost covered the whole exterior of the Colossus, the only thing left is the bottom of the case.
This is usually one of the least exciting areas of a case but as you can see on the picture below there are quite a lot of features here. There are four feet, the vent for the case door, a honeycomb fan grill for an optional 120/140mm fan and a removable dust filter for the power supply area.
The PSU dust filter can be washed and on this picture you can also see that the feet have metal edges.