The Y-Chromosome DNA (Y-DNA) results chart is color coded to show where someone in a subgroup differs from the calculated modal value for an STR (short tandem repeat) marker. For each step less than the modal value, a progressively darker shade of blue is used for the background color. For each step greater than the modal value, a progressively darker shade of pink is used for the background color.
GAP Color Scale
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Public Website Color Scale
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