>>2712033This is not how you do it.
In B&W, there is only one histogram: Luminance. It shows how many pixels are at any given level of brightness from 0 to 255.
When you add a B&W filter, you basically "flatten" the colors like you can "flatten" the layers in Photoshop. When there are equal amounts of each color, red, green, and blue, you get gray.
As you can see with the "Black & White" image adjustment or adjustment layer in Photoshop, there are different ways of converting to B&W, but in the end they all just change the histogram levels and make the color channels equal so that you see gray.
To get good high-contrast color shots, you need to learn to manage three channels of color. There is a histogram for each. Each can be considered a black and white image that just contains info about how much "luminance" each channel should have. Each can be edited with contrast, sharpness, even Adobe Camera RAW can be used on channels. You need to make your changes skillfully so that the color balance or white balance you want is not fucked up, but this is how to go about it.
In short, editing color is more than just going Brightness/Contrast.
>>2712045 is a great example of how not to do it because the red channel is MASSIVELY overexposed. If you look at the red channel as a black and white image, those guys' jackets and the red traffic cone are both pure white, 100% blank.(Don't try capturing high-contast color in your camera. The camera captures the RAW stuff and does its own retarded photoshopping after, and then you get bad results in most cases. You need to do this on your own.)