I think its a good idea as long as the escrow is reputable in the community.
It also helps clarify between new escrowed campaigns and new unescrowed campaigns.
If the escrow was relatively unknown though would be a bit more worried if some new fund escrowed with them as it could be an alt.
Well, the green part would only be done if someone is reputable. I would, for example, never color myself green. It's easy for me to say I'm trusted and even if people said they trust me, I wouldn't give myself a green color. Just for the sake of being fair.
EDIT: The next auction is up as well:
Advertise in the Signature Overview Thread [Round 5]