Update README

exogen · Oct 10, 2024 · 93b4d8b · 93b4d8b
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@@ -61,7 +61,8 @@ It is important you don’t mutate the returned RGB values without copying them
 into your own array first.
 
 When snapping colors to the Turbo colormap, a kd-tree is used to perform
-nearest-neighbor search.
+nearest-neighbor search. Color similarity it judged via simple Euclidian
+distance in RGB space.
 
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