Maybe better to ask forgiveness than permission.
Maybe. OTOH, is it better to sleep in the yard this time of year or in the winter. I might choose winter here right now.
And... Green is nice, but with a sufficient collection of black webers, it is possible to slip in a new one now and then w/out notice. Might work with dark green. Not with yellow or red unless they come with covers.
Good luck with your next acquisition!