The readings are kun'yomi, but you should have seen both 白 and 黒い separately as vocabulary by now. It's the same readings here, so you can apply that knowledge and read this word!
Let’s make it clearly black and white.
This black and white photo is very lovely.
I agree that Kanae always wears very chic clothes, but today that black and white dress just makes her look like a panda, doesn’t it?