Abiquo uses WebMKS (also called WMKS) for remote access to VMs running on vCloud Director and vCenter.
You can brand WMKS by customizing a CSS file. The CSS classes are defined by WMKS.
To create a branding "theme_wmks.css" file:
Open the copied file and apply the desired changes
Changes to the Abiquo default theme in /theme/abicloudDefault/css/theme_wmks.css will be lost when you upgrade Abiquo