Presets: Allow chrome://whatever

When using add-ons like "Speed Dial", "New Tab King", "New Tab JumpStart" or other add-ons which you use in a tab, it would be great if you could give them a specific color! So by adding "chrome://speeddial", for example, in the presets you should be able to give the Speed Dial tabs their own color! This would be very useful for me, since it has a to common color right now (I use "Generate Colors By Domain Hostname"), and I need to distinguish them quickly.

Thanks in advance!