Quick Calligraphy Question

My invite is printed in a gray block letter and to contrast our names are in black script. I am having my envelopes done by Inkspun and planned to have the addresses in black script - even though the return address on the back flap is gray block letters (which I didn't think about when I ordered). Is this OK?

Bill just called to ask if I want the addresses in gray to match the black flap - I don't think it's a nice enough contrast with the ecru envelopes.

What do you think?

i am so sorry that you are not happy with your invites but if it does not cost you any more money then I would use the grey to match the back of the envelope for consistency purposes.
ETS - Actually re-read your post: do black on ivory - I am not sure that the grey on ivory would look right.