Can I achieve simply the state of my system with no color?
I'm using openbox.
I have seen how to convert a picture from color to grayscale in this Super User question and answer thread. However, grayscale is not black and white.
Simply put, if a field has color, I want to convert it to black. All other areas should be white. So, if a line 6 pixels thick is orange, the other thread's answer will turn the line gray.