Just a few ideas of colour combinations. I have used what I already had to show ONLY the shades, not necessarily the clothes combinations..
I don’t particularly like just two colours in an outfit anymore, I think there should be at least three, preferably more. Of course you could make it interesting also wearing two shades of the same colour and perhaps add some pattern in small doses. Different textures are also nice and count as if it was an extra colour, for example fur, leather, fabric, knit, etc.
Tweed, duck egg blue and white.
Mid grey, fox fur and gold.
Mid grey, denim and pea green.
Beige, leather, pink and grey.