In your opinion, what was the artist trying to convey the observer

It is true but it depends on camera, computer, programs, all that stuff

It depends on what type of third separates the three notes.for example: if you have two mayor thirds is an "aumented chord"if you have two minor thirds is an "diminued chord"if you have one mayor first and then one minor is a "mayor chord"and inverted is a "minor chord"