What is the most difficult thing to quit color?

I was right downstairs. Psychosexuality is the hardest thing to give up. If you succeed in abstaining from obscenity, you will basically succeed in abstaining from color. A more effective way to quit psychosexuality is to learn Buddhism (Buddhists), learn articles about abstinence from color every day, and look at the experience of predecessors. In short, we should use positive energy to wash away the filth in our hearts and control our eyes and hearts every day. In fact, I still recommend you to learn Buddhism, although people who don't understand it will feel bored.