Buyers are more concerned with the schools, taxes, number of bedrooms, age of the home etc. and generally pay very little attention to the color unless it is overwhelmingly bad.
Our recommendation is to do what many people do when considering painting their homes. Drive around and look for similar homes, paying close attention to their colors. There's no point in reinventing the wheel for something so simple as the color of a home. Most homeowners would be happy to share the brand and color of their paint.