Also, the color doesn’t make that much of a difference. Like a percentage you can count on one hand. Much more significant gains can be had from ridge vents and other ways of getting the heat out of the attic, and insulation to keep that heat from going into the house.
At least according to my acquaintance in the roofing industry, and obvs this is regarding typical US/Canada SFHs
And SuperfastMatt! He shows the messy process of backyard engineering, doesn’t waste your time or yell at you, and there’s a little dry humor in there