I recognize that a lot of shorts and skirts come in a variety of colors. I even own a red pair and a purplish pair of shorts and a pink skirt. But there is a reason shorts and skirts are the exception.
Take a look at the options for running tights and capris at any running store, and you will have a tough time finding anything other than black. So when I saw these on sale for $25, I was pretty excited to be able to add a new color to the bottom half of my running wardrobe.
About three miles into my run, I looked down and was grateful for the long length of my tank. If you looked close enough (which I realize no one should be doing, but that isn't the point), it looked like I peed my pants. I had some serious crotch sweat happening. And I'm sure there was booty sweat to match.
The reason you can get away with shorts and skirts of just about any color is because most of the crotch sweat stays in the liner of the shorts/skirt.
So there you have it. My sweaty lesson learned. However, I love the capris, so sweaty crotch be darned.