Fix Input cursor visibility when in ANSI mode

Author: SYK17

CHANGELOG.md

@@ -11,6 +11,10 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 - Added `Content.blank` https://github.com/Textualize/textual/pull/6264
 
+### Fixed
+
+- Fixed `Input` cursor color display in ANSI mode (`ansi_color=True`) https://github.com/Textualize/textual/issues/6234
+
 ## [6.7.1] - 2025-12-1
 
 ### Fixed

src/textual/widgets/_input.py

@@ -218,7 +218,8 @@ class Input(ScrollView):
             background: ansi_default;
             color: ansi_default;
             &>.input--cursor {
-                text-style: reverse;
+                background: ansi_white;
+                color: ansi_black;
             }
             &>.input--placeholder, &>.input--suggestion {
                 text-style: dim;