I'm trying to use TCL to change the colour of atom boxes. In Extended 0.43.4 I'm able to do it using the command:

set obj_box_fill #ffff6c

But this doesn't seem to work for me in Vanilla 0.45.4. Can someone suggest an alternative command?

While I'm here, is there a way to set the colour of atom boxes on only a particular canvas, rather than for the whole class? Using [hcs/canvas_name], perhaps?