the wood siding serves as the main neutral and reads as a light tan-taupe color. The soft olive green also reads as a neutral, and they both serve as a nice supportive ground for the bits of deep purple on the door and window frame.
Another purple and gray-green door and siding
— the siding — one of the neutrals. Then use the bold hue for doors, trim or accents.
The second neutral should coordinate with the main neutral, but you want it to be different enough that it reads as a completely different color; otherwise it can look like you were trying to match colors and made
— the siding — one of the neutrals. Then use the bold hue for doors, trim or accents. The second neutral should coordinate with the main neutral, but you want it to be different enough that it reads as a completely different color; otherwise it can look like you were trying to match colors and made a