I would think that the color selective is black, because it absorb high solar radiation. 

Be a bit careful here, you are absorbing solar which peaks at about 550 nm wavelength, and use it to heat a plate to, say, 100C maximum. You want your paint to be black at visible wavelengths and white at 10 micron plus so it doesn't re-radiate very much.

Tony gave some required properties of the selective solar paints.You can know the paints themselves from information in the link:http://www.solarserver.com/knowledge/basic-knowledge/solar-collectors.html

wish you success