The 8 standard colors grouped into 8 heptagons polygons
v.1/3 : The circles at foreground, the heptagons at background
v.2/3 : The circles at background, the heptagons at foreground
v.3/3 : All the additive colors, with great transparency appearance !
Moreover, the colors are perfectly arranged by brightness intensity
Converted to 1-bit :
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