Tests if the color datatype is supported. There are multiple syntaxes for specifying the same color, such as #37F and #3377FF. This test is focussed on the X11 color names, which are not part of the tiny profile. Each group of circles uses four forms - 6-digit hex, rbg() integer form, rgb() percentage form, and named ('X11') colors. It does not use 3-digit hex, because the colors used in this test cannot be represented in three digit form.
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For each of the nine groups of circles shown here, all circles must be identical in color, and the same color as in the reference image.