Changing Object Colors
Objects and object groups' color and transparency can be changed using the color icon. If the object group contains objects of different colors, the multicolor icon is used. If all objects in the group have the same color, the color indicator will use that color. The transparency is always 0% by default.
Once color and transparency have been changed, they are reflected by the color indicator.
When changing color and transparency for an object group, it is changed for all objects in the group accordingly.
Custom colors are not supported.