You know they named it Terra Cotta because nothing rhymes with Orange.....
Age does affect color and the shading can go either way. Also, when you repaint, your new paint in being mixed XX number of years after the original was, so even if the formula was the exact same one, its going to be different. Further, on some thinner colors, like red, your primer color affects the shade of the finished coat. White primer will give a lighter end coat than a dark grey primer and so forth.
Tin
