German artist Jan Vormann travels around the world and restores crumbling architecture using LEGO blocks. In his work titled Dispatchwork, Vormann has spent three years filling in the cracks of buildings with colorful LEGO pieces.
The RGB Colorspace Atlas designed by American artist Tauba Auerbach. It's a perfect cube, measuring x x and is said to contain every visible colour in existence. Take a look, it's in a book, a Reading Rainbow!