The question was about a team that uses color-coded source code to keep track of what needs to be done, but now they have a color-blind team member, and want to know what to do. For anyone who can't read it, my answer was:
Well, you could do what the rest of the world does and use an issue tracker, along with comments in the code
This is a serious answer - there is no need to use a convoluted color-based system to solve a problem that has already been solved. Apparently a lot of people agreed with me, since it was the third most-upvoted answer.
Yet, it was recently deleted. Why?