diff --git a/CHANGELOG.md b/CHANGELOG.md
index 041c7ff433..af50714fbc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -15,13 +15,11 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 - Fixed running `App.run` after `asyncio.run` https://github.com/Textualize/textual/pull/5799
 - Fixed triggering a deprecation warning in py >= 3.10 https://github.com/Textualize/textual/pull/5799
 - Fixed `Input` invalid cursor position after updating the value https://github.com/Textualize/textual/issues/5811
+- Fixed issue where nested colors in markup were ignored https://github.com/Textualize/textual/issues/5826
 
 ### Added
 
 - Exposed `CollapsibleTitle` https://github.com/Textualize/textual/pull/5810
-
-### Added
-
 - Added `Color.hsv` property and `Color.from_hsv` class method https://github.com/Textualize/textual/pull/5803
 
 ## [3.2.0] - 2025-05-02
diff --git a/src/textual/markup.py b/src/textual/markup.py
index 06a0effd98..a0684e0396 100644
--- a/src/textual/markup.py
+++ b/src/textual/markup.py
@@ -5,6 +5,8 @@
 
 from __future__ import annotations
 
+from operator import attrgetter
+
 from textual.css.parse import substitute_references
 from textual.css.tokenizer import UnexpectedEnd
 
@@ -411,9 +413,12 @@ def process_text(template_text: str, /) -> str:
 
     content_text = "".join(text)
     text_length = len(content_text)
-    for position, tag_body, _ in style_stack:
+    while style_stack:
+        position, tag_body, _ = style_stack.pop()
         spans.append(Span(position, text_length, tag_body))
 
+    spans = sorted(spans[::-1], key=attrgetter("start"))
+
     content = Content(
         content_text,
         [Span(0, len(content_text), style), *spans] if style else spans,
diff --git a/tests/test_markup.py b/tests/test_markup.py
index 718c61752c..46d7101994 100644
--- a/tests/test_markup.py
+++ b/tests/test_markup.py
@@ -35,9 +35,9 @@
             Content(
                 "What is up with you?",
                 spans=[
+                    Span(0, 20, style="b"),
                     Span(0, 10, style="on red"),
                     Span(5, 20, style="i"),
-                    Span(0, 20, style="b"),
                 ],
             ),
         ),
@@ -84,6 +84,17 @@
                 spans=[Span(0, 35, style="#ff0000"), Span(7, 35, style="#ffffff")],
             ),
         ),
+        (
+            "[blue][green][red]R[/red]G[/green]B[/blue]",
+            Content(
+                "RGB",
+                spans=[
+                    Span(0, 3, style="blue"),
+                    Span(0, 2, style="green"),
+                    Span(0, 1, style="red"),
+                ],
+            ),
+        ),
     ],
 )
 def test_to_content(markup: str, content: Content):