It's lovely that the developers take notice and add shapes in addition a color difference to ease identification for many people with colourblindness, or otherwise impaired vision.

Just to further increase awareness of a useable feature, even though you likely know of it, is the accessibility settings.
Under system configuration > accessibility settings there are color adjustments for colourblindness. Fiddling with those settings might produce an image that on your monitor makes it easier to differentiate the mechanics. (I am not colourblind myself, but I have found them useful in certain content to more easily identify things. Particularly when playing on a screen with poor colour reproduction)