Olafur Eliasson - the master of refracted light and colour. He is a Danish-Icelandic installation artist who works with light, water and air temperature. His biography on his website describes his work as being:
"...driven by his interests in perception, movement, embodied experience, and feelings of self. Eliasson strives to make the concerns of art relevant to society at large. Art, for him, is a crucial means for turning thinking into doing in the world".
I'm a fan!
You can see more of his beautiful work here---> Olafur Eliasson.