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This is like image 11 with a "checkerboard" effect. The odd-numbered squares are exactly the same as in image 11, but the even-numbered ones have been "rotated" by 60 degrees about the diagonal "gray" axis in color space.
Each odd-numbered square is now surrounded by 4 even-numbered ones with any two abutting colors having an "analogous" relationship. This has a certain attraction and charm to it.
Such a rotation by 60 degrees in color space is the same as moving one position around a 6-color color wheel. It should be kept in mind that the RGB color primaries (red-green-blue) are not the same as the "art text" color primaries (red-yellow-blue).
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