The color black is a good assistant to help you create a mysterious and secretive atmosphere in your video. However, it is also the color that can provide protection from external emotional stress. It creates a barrier between itself and the outside world, providing comfort while hiding its negative emotions and feelings. So it is a good choice for you to express vulnerabilities and insecurities. Because what it hid is that it expressed.
There are 36 black gradient color matching schemes for your choice.