Apply suggestions from code review

lukashergt · timhoffm · web-flow · commit 64e3a86fbfaa · 2025-07-18T17:03:16.000+02:00
Using helper for `'none'` string equality and using the fact that `to_rgba` always returns a 4-element tuple to simplify the code.

Co-authored-by: Tim Hoffmann &lt;2836374+timhoffm@users.noreply.github.com&gt;
diff --git a/lib/matplotlib/legend.py b/lib/matplotlib/legend.py
@@ -609,10 +609,9 @@ def __init__(
                                 text.set_color(color[0])
                             else:
                                 pass
-                        elif isinstance(color, str) and str(color).lower() == 'none':
+                        elif cbook._str_lower_equal(color, 'none'):
                             continue
-                        elif (len(mpl.colors.to_rgba(color)) == 4
-                              and mpl.colors.to_rgba(color)[3] == 0):
+                        elif mpl.colors.to_rgba(color)[3] == 0:
                                 continue
                         else:
                             text.set_color(color)
