The Guild Banner Designer is a replica of the Guild Emblemer: you can design your cape, change patterns, colors and emblem with the same options like the one in Guild Wars. Also, you can add a cape trim and export your creation.
The other 7 trim colors (blue, green, orange, pink, purple, red and obsidian) can now be picked, have fun!
If you do not have an elite skill equipped, you have +2 to all attributes, +2 Health regeneration, and +1 Energy regeneration.