diff --git a/rich/highlighter.py b/rich/highlighter.py
index e4c462e2b..10a6c1f74 100644
--- a/rich/highlighter.py
+++ b/rich/highlighter.py
@@ -95,7 +95,7 @@ class ReprHighlighter(RegexHighlighter):
             r"\b(?P<bool_true>True)\b|\b(?P<bool_false>False)\b|\b(?P<none>None)\b",
             r"(?P<ellipsis>\.\.\.)",
             r"(?P<number_complex>(?<!\w)(?:\-?[0-9]+\.?[0-9]*(?:e[-+]?\d+?)?)(?:[-+](?:[0-9]+\.?[0-9]*(?:e[-+]?\d+)?))?j)",
-            r"(?P<number>(?<!\w)\-?[0-9]+\.?[0-9]*(e[-+]?\d+?)?\b|0x[0-9a-fA-F]*)",
+            r"(?P<number>(?<!\w)\-?[0-9]+\.?[0-9]*(e[-+]?\d+?)?\b(?!\w|\.)|0x[0-9a-fA-F]*)",
             r"(?P<path>\B(/[-\w._+]+)*\/)(?P<filename>[-\w._+]*)?",
             r"(?<![\\\w])(?P<str>b?'''.*?(?<!\\)'''|b?'.*?(?<!\\)'|b?\"\"\".*?(?<!\\)\"\"\"|b?\".*?(?<!\\)\")",
             r"(?P<url>(file|https|http|ws|wss)://[-0-9a-zA-Z$_+!`(),.?/;:&=%#~@]*)",