Different Images per Tab possible?

I use several tabs with shortcuts for different purposes. So I started categorizing, like:

- business

- clients

- tutorials

- ect.

It would be awesome if there would be a possibility to have a individual background set for each of these tabs/categories, so you'd be able to see right from the background already what category you are in.

I was looking around, but I could not find this possibility. So is this possible? How?

Or if it is not possible at the moment, can this become an Idea to follow up with?

PS: I really love FVD Spee Dial for Chrome - that's why I care and would love to see this enhancement. Thx for this excellent work!!! :-)