The Happy Hour color wheel consists of exotic cocktail umbrellas. It was created by Bright Lights Little City:

The Rocks color wheel is a collection of stones from Salmon River, Idaho. It was assembled by Purl Bee:

This Yarn Skeinlet color wheel features dyes made of cochineal (ground up cactus-eating scale insects), osage orange, chamomile, indigo and logwood. It was created by Sarah of the Blue Garter blog:

The Circle of Life color wheel was created by Thalandor as a tribute to the artist Mother Nature:

This Kusudama (Medicine Ball) color wheel was created by Origami artist Vanessa Gould:

The Pencil Shavings color wheel was photographed by Myruby:

And a full pencil color wheel was taken by ERK_

This Garden Blossom color wheel is the work of Tiny Haus:

The Juggler color wheel was painted by Kenneth Callicutt:

The Chalk color wheel was photographed near Parc De La Villette, Paris, by Jacobz:

Another chalk color wheel was spotted in Paris by seanhabig: