The link below provides a list of paint colors which are acceptable and “pre-approved.” If you use another brand of paint, it must match one of the Sherwin-Williams colors (SW codes).

If you wish to paint your house trim, garage doors, doors, chimney or siding a color not on the list, ACC approval is required. In no case shall brick be painted.

Coppell Greens – HOA Color Archive
https://www.sherwin-williams.com/homeowners/color/find-and-explore-colors/hoa/coppell/tx/coppell-greens/