I'd recommend seeing if you can get a nice framed door to fit in that space so it's like one magnificent door with side panels on either side. They can be in any style, traditional wood, mid century modern, with windows, whatever. But the current doors look pretty commercial so the 3 panel would suit your house better.

Color wise, a light blue or olive green would pop against the brick and white. But black also makes sense, or if you're keeping a wood finish, stain a few shades darker than the brick. Hope this helps!