Update plotly_colorwheel.txt

plotly_colorwheel.txt

@@ -24,7 +24,7 @@
 17, Smoked Rose,   #EC5378
 18, Stone Blue,    #5C8ED8
 19, Dried Herb,    #AFB841
-20, Deep Mulberry, #b565a0
+20, Deep Mulberry, #f576d3
 21, Warm Taupe,    #CD9A6C
 22, Dark Spruce,   #4B9D7D
 23, Clay Red,      #E83E3E