You change the color drawing styles of all observations in the current data set by clicking the Color button in the primary console or the temporary console and a color palette like the following will show up:
If the Shift key is held down when the OK button is clicked, the selected color will also be used as the default drawing color for any data sets loaded into Argos in the future.
Color palette is modal.
You can undo and redo color changes effected through this color palette with Ctrl-Z and Ctrl-Y , respectively, in a viewport in paint mode or in a mode that supports Auto Paint.