  There are two acceptable spellings of gre/ay, and in my mind, they are completely different colors (colours, if you will). I'm just wondering if this is just something I've dreamed up out of nowhere or if anyone else is feeling me on this. Someone can have grey eyes, but not gray eyes. You can have a gray car, but not a grey one. I picture grey as a soft, watercolor color but gray as a harsh, marker color (once again, I do spend a lot of time with a toddler). Grey is clearly the more poetic of the two colors; gray is the one with the more negative connotation. So you can't have a grey day, but you can have a gray day. *side note: I just looked down and realized I have a gray shirt on! * Here are some examples just so you can see I'm not crazy: "Brunette hair, Grey Blue eyes and is dressed to Thrill, in a beautiful Peach Gown with White Lace.
" "I can see through the mist of your gray blue eyes. You have a hidden feeling, and you don't know what to say. " some fine online poetry by J.J. Anne Marie Loeffler (could this be Jill "Birthday Song" Loeffler? ) P.S. Who gets their "thrills" from porcelain dolls?! I looked up "grey blue eyes" and this is one thing that came up. 
