diff --git a/src/mplhep/plot.py b/src/mplhep/plot.py
index 3c1c40b4..69e1b210 100644
--- a/src/mplhep/plot.py
+++ b/src/mplhep/plot.py
@@ -305,8 +305,11 @@ def iterable_not_string(arg):
     for kwarg in kwargs:
         # Check if iterable
         if iterable_not_string(kwargs[kwarg]):
-            # Check if tuple (can be used for colors)
-            if isinstance(kwargs[kwarg], tuple):
+            # Check if tuple of floats or ints (can be used for colors)
+            all_entries_numerical = all(
+                isinstance(x, int) or isinstance(x, float) for x in kwargs[kwarg]
+            )
+            if isinstance(kwargs[kwarg], tuple) and all_entries_numerical:
                 for i in range(len(_chunked_kwargs)):
                     _chunked_kwargs[i][kwarg] = kwargs[kwarg]
             else: