Update plotly_colorwheel.txt

plotly_colorwheel.txt

@@ -17,7 +17,7 @@
 10, Charcoal Sage, #84d1ae
 11, Rust Brown,    #EC5C23
 12, Dusty Navy,    #3F6DBF
-13, Warm Terracotta, #D4724A
+13, Warm Terracotta, #f57f4e
 14, Plum,          #f75ca9
 15, Warm Slate,    #B89466
 16, Dark Cyan,     #15edea