the toolbar in the orion webapp doesn't seem to support as many colors as it should, and there are issues with the traffic lights.
BTW, I have "Show toolbar button shapes" enabled in settings. Orion webapp toolbar does not show these button shapes, because of the weird toolbar buttons being used.
additionally, the toolbar does not support translucency
eg1
safari webapp:

orion webapp:

orion:

notice how orion webapp lacks the border around each of the traffic lights.
eg 2
safari:

orion webapp:

orion:

orion non-webapp can support this background color, but for some reason, the orion webapp does not.