diff --git a/src/textual/color.py b/src/textual/color.py
index 5899d2c47..73adbabf3 100644
--- a/src/textual/color.py
+++ b/src/textual/color.py
@@ -277,11 +277,14 @@ class Color(NamedTuple):
 
         if rgb_hex_triple is not None:
             r, g, b = rgb_hex_triple
-            color = cls(int(r + r, 16), int(g + g, 16), int(b + b, 16))
+            color = cls(int(f"{r}{r}", 16), int(f"{g}{g}", 16), int(f"{b}{b}", 16))
         elif rgb_hex_quad is not None:
             r, g, b, a = rgb_hex_quad
             color = cls(
-                int(r + r, 16), int(g + g, 16), int(b + b, 16), int(a + a, 16) / 255.0
+                int(f"{r}{r}", 16),
+                int(f"{g}{g}", 16),
+                int(f"{b}{b}", 16),
+                int(f"{a}{a}", 16) / 255.0,
             )
         elif rgb_hex is not None:
             r, g, b = [int(pair, 16) for pair in split_pairs3(rgb_hex)]
diff --git a/tests/test_color.py b/tests/test_color.py
index 26f65f724..e1db3922b 100644
--- a/tests/test_color.py
+++ b/tests/test_color.py
@@ -93,6 +93,8 @@ def test_color_blend():
         ("#000000", Color(0, 0, 0, 1.0)),
         ("#ffffff", Color(255, 255, 255, 1.0)),
         ("#FFFFFF", Color(255, 255, 255, 1.0)),
+        ("#fab", Color(255, 170, 187, 1.0)),  # #ffaabb
+        ("#fab0", Color(255, 170, 187, .0)),  # #ffaabb00
         ("#020304ff", Color(2, 3, 4, 1.0)),
         ("#02030400", Color(2, 3, 4, 0.0)),
         ("#0203040f", Color(2, 3, 4, 0.058823529411764705)),