In PS and AI, there're a lot of built-in color/gradient libraries, and when you want to select a color, you ca just append them or open a color library, but in indesign, there're no ways you can do so, a lot of the color selecting work is done by guessing unless you know which color you want to choose

I hope there will be a built-in color library (if the interactive buttons can have a built-in library and why don't we add a sample color library?

I know the "Official" way to do this is using Adove Color Theme Panel, but lets face it, this panel is takes so long to load the UI, and everytime you switch between different pane, it takes a long time to load the UI as well. not a good idea when you just want to choose color on the fly