In CRM 2013 the UI features much more color and the OOB entities have colors assigned to them. The Process flows also are very colorful. The color is great and makes the appearance of the app much more appealing. However, it is not possible to modify the Entity colors in a supported manner at this time.

Customizing colors not only has an aesthetic aspect but it also streamlines user adoption because it becomes easier for new users to recognize where they are at and which entity/entities they are working with at a glance. Seems like it ought to be a simple (said nobody ever) config parameter in the customization UI or even using the SDK to modify the CSS, but I understand that there is not a currently supported method to do so (we do not implement unsupported hacks).

Please consider this change! It would provide business value to the beauty that you have already built into the new UI!