I am new to Krita and am using the Age of Asparagus tutorial for Bob Ross's Mystic Mountain painting ( https://www.youtube.com/watch?v=2SNM4zlBTRo ) in the version used in the video, the mixing colors at the bottom of the Docker " Digital Color Mixer" have down arrows to access the Add/Remove Colors panel. The newest version 3.1.4 doesn't have them, I am wondering what I would use to access the panel.

Inquiring Minds would like to know.

Just click the color box bellow the slider and it will open the new color selector.
There you yill have the "Add / Remove Colors..." button.

Simple, Thank you much.