I have a greige Twiggy and Money wallet (use as a clutch). I love the color (which surprised me because I am not one for the lighter Bbag colors but this one is such a great neutral!) and have not had any color transfer issues. I wear it with jeans mainly. I bet the Day would be fantastic in that color. I would love to see a pic if you end up getting one. Good luck!
By the way.... I LOVE your Siamese!!!!!! (I have one and I absolutely love their coloring and blue eyes)