In the case of this tessellation I found a variant of one I'd previously folded by Arseniy K called 'Clog O Clock'.

While he used rhombuses and triangles, I went with all rhombuses. 

The negative spaces are open back hexagons. 

All the rhombuses are on the front. 

Some are fully front forward, while others must partially reverse . 

That's what creates the pattern of some darker rhombuses and some lighter ones. 

You can see from the photo of the reverse side that there are no triangles at all. Which is unusual. 

Still need to take a pic of the crease pattern. Will add it at a later date.