Purple Frog, Dutch Design is rated 3 out of 5 in the category design. Read and write reviews about Purple Frog, Dutch Design. Purple Frog is a brand with cheerful home&lifestyle products. This purple frog wants to be different from all his green friends. That's why Purple Frog puts daily products in a different perspective. With the Marshmallow swing, Purple Frog introduced an unique and joyful product. A very soft swing, like a floating pillow, can be used in- and outdoors.