Merge pull request matplotlib#28001 from meeseeksmachine/auto-backport-of-pr-28000-on-v3.8.x

Backport PR matplotlib#28000 on branch v3.8.x (Fix color sequence data for Set2 and Set3)

Author: QuLogic

lib/matplotlib/colors.py

@@ -127,8 +127,8 @@ class ColorSequenceRegistry(Mapping):
         'Accent': _cm._Accent_data,
         'Dark2': _cm._Dark2_data,
         'Set1': _cm._Set1_data,
-        'Set2': _cm._Set1_data,
-        'Set3': _cm._Set1_data,
+        'Set2': _cm._Set2_data,
+        'Set3': _cm._Set3_data,
     }
 
     def __init__(self):