Working with what stays
Separate brown from gray-brown
Two useful brown-roof layouts are a compact ranch and an olive two-story house. Several other roofs in these examples read as mixed gray and brown; they belong in a separate comparison rather than being treated as the same roofing color.
Check the second fixed material
On the brick-and-siding example, the new siding must sit beside both roof and brick. On the lighter ranch, the roof has more influence because there is less prominent masonry. Use the closer material arrangement when deciding between beige and green.
