I have been told by Hermes staff that although PHW has been the fashion for a long time now, GHW is slowly coming back in. I saw a 35cm Birkin in Epson with GHW last weekend at the Gold Coast (Australia) and am still thinking about it ... they do exist!
Eventually the one you want will come your way. If it's Hermes you shouldn't really compromise.
I have been told very strongly by a staff member at Fauborg St Honore that Etoupe does NOT come EVER with GHW, only PHW, because gold looks "ugly" with Etoupe. This is sad because IMO it's a divine combination - my mother had a gold hermes watch that I made her put an etoupe band on, and she feels bad now wearing it because of the "ugly' remark from the SA.
There was the most beautiful Kelly 35cm in Etoupe CHEVRE(!!!) - in short my abosulute dream bag - but the PHW was not to my taste even though the rest of the bag was perfection - especially the spine. couldn't buy it because it would annoy me too much that is wasn't what I wanted.
Ergo, I think they should match your jewellery. I have a lot of silver hardware bags that annoy me. So tragic that LV have gone over to silver on their epi line making it more casual looking - now I have to collect vintage pieces with GHW!