This is a model of the color palette in Tinkercad, so that you can test how various TInkercad colors will look when printed in Full Color Sandstone
(coated or uncoated).
From Legacy (non-Beta) Tinkercad designs you can export .VMRL files that can be directly uploaded to Shapeways for 3D printing. Unfortunately, you cannot currently export in Shapeways-ready color from new/Beta Tinkercad designs.
For more information about this model and about 3D printing in color, check out our article Multicolor 3D Printing, from Tinkercad to XYZ
If you want to test Tinkercad colors on a home desktop color 3D printer like the XYZ Color, you can download this model for free from Thingiverse