Fix Input cursor visibility when in ANSI mode

CHANGELOG.md

@@ -13,6 +13,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ### Fixed
 
+- Fixed `Input` cursor color display in ANSI mode (`ansi_color=True`) https://github.com/Textualize/textual/issues/6234
 - Fixed alt modifier on systems without extended Key Protocol https://github.com/Textualize/textual/pull/6267
 - Fixed an issue where alpha keys with modifiers weren't lower cased. If you have bound to something like `ctrl+A`, then change to `ctrl+shift+a` https://github.com/Textualize/textual/pull/6267
 - Fixed exception when setting `loading` attribute before mount https://github.com/Textualize/textual/pull/6268

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;