Is there a way to call color picker through script without creating a temp null?

I saw a script doing this so I tried searching for a method for it but it includes creating a temp null I want to know if there is a way to call the color picker through the script without creating a temp null.

You can check this video to see the script calling the color picker.
https://youtu.be/L1D_R83Slh4?t=184