What colors are allowed for exterior paint on my house?

You can find information about exterior paint colors in the Regulations and Guidelines for Building at Coolfont in Section II.A.3 (on page 4):

Exterior Colors. The colors of all exterior finishes shall be natural or earth shades of gray or brown with values intermediate between black and medium grey, or shades of grey, green or brown-green with values between black and medium. Colors shall be selected for harmony with natural environment rather than any strong contrast. Colors for all exterior elements (doors, windows, door and window trim, shutters, soffits, parging, siding, roofing, railings, and all wood trim, etc.) shall be included on the approval sheet, with samples provided…