Admittedly, I have neither read nor seen 50 Shades of Grey but that won't stop me from jumping on the grey (err, gray) bandwagon! (Why gray not grey? Because "a" is the Americanized spelling of the color; "e" is the British spelling and I'm a Yankee, yo!)
I love love LOVE the color gray. There's something about the shade that just does it for me. It's warm and comforting but not too boring, it's present but not in your face, it's a neutral that plays nicely with just about any color but it's also beautiful on its own or against a simple black or white. And give me some variation like a minky brown gray or a purple-y gray? Swoon. I'm in love.
As far as gray envelopes go, there are gorgeous choices to be had: Neenah makes a light "antique gray" as well as a deeper "pewter" color in its Classic Crest line; French Paper Co. produces a stunning "steel blue" shade and a brooding "steel grey" that would be an absolute knockout with gold lettering on top.
But it's not only envelopes that get in on the gray fun! Private Reserve makes a lovely "gray flannel" ink that I'm dying to try, and Pearl Ex, my newest obsession, makes not only a stunning "gray lavender" but also a pigment called "mink" that's just the right blend of brown, gray, pink, and purple to set my heart aflutter.
Turns out there are way more than 50 shades of gray, and I'm dying to try them all.