Apparently, when you add colors to assets and group them, the groups are not available in color picker. All colors show under color picker in one list. When you have a lot of colors, it is impossible to separate them from each other. We have a large project with almost 10 base colors in the style guide and for each of them 10 tone variants. Of course you can select the colors from assets, but it would really make life easier if the color picker would show asset colors under their groups instead of one list.