The Battlestar Euronica does pick up the Idea of boundaries, already used in the Easter eggs, but the (much narrower) boundaries are interrupted by edges. Thus, geometry provides the room for four different colour-rows (fields, boundaries, edges and lines), three of them harmonizing, one using the complementary contrast. This also helps to establish a border between foreground and background, simply be eliminating the boundaries in the background. Also, the complexity of colours did increase further. E.g. the field colours don’t start at a basic blue, but already carry that hint of purple, that increases an dominates towards the outside. Foreground colours and Background colours do find the balance of being close enough to match, but differently enough to separate the background from the foreground.
Diavolo (the picture just looks hot like Hell) does use an un-round bending area. The bending in the middle of the picture still look pretty round, but now blends into the sharp edges. The complexity of boundary’s increased, now forming a star-pattern all over the picture. Try concentrating on the yellow fields. Can you see them jumping to the foreground, forming diagonal, almost flower shaped stars, pushing back the original stars to the background?
Now with the sand glass figure the (clearly Vega-style) bending areas does get wild, forcing the background int something similar to the Vonal-style. The boundaries overtake the majority of the field area. And four colour rows (empty fields, empty boundaries, sand boundaries and background) do lead to the same turquoise, meeting themselves in the boundary of the sand glass figure, forming that glowing-effect. Have you recognized, that the colour-row of the empty boundaries does jump into the sand fields, continuing its journey to white towards the centre? Two more colour-rows (empty line and sand lines) do support the illusion of sand rippling from the upper to the lower chamber. Plus, there are these tiny little edges. What colour do you see? In fact, they are grey. If you see a light pink or orange note, that’s the simultaneous contrast again.