It is best not to use big red or golden yellow in the bathroom. These colors belong to fire in the five elements, and the bathroom, as a place to discharge filth and a hiding place for "little people", can't be "fire". The color of bathroom should be light. White is the most common color in the bathroom. Clean and bright, in line with people's needs for bathroom. This is called "the dirty place should be clean and the smelly place should be fragrant", which is a flexible application of the principle of complementarity and balance.
If you don't understand anything, you can consult the Feng Shui master of the Red Sailing Club at the Decoration E Station.
I hope I can help you.
Decoration e station communication