diff --git a/web_src/css/themes/theme-forgejo-auto-deuteranopia-protanopia.css b/web_src/css/themes/theme-forgejo-auto-deuteranopia-protanopia.css
deleted file mode 100644
index 5f97fa377c..0000000000
--- a/web_src/css/themes/theme-forgejo-auto-deuteranopia-protanopia.css
+++ /dev/null
@@ -1,2 +0,0 @@
-@import "theme-forgejo-light-deuteranopia-protanopia.css";
-@import "theme-forgejo-dark-deuteranopia-protanopia.css" (prefers-color-scheme: dark);
diff --git a/web_src/css/themes/theme-forgejo-auto-tritanopia.css b/web_src/css/themes/theme-forgejo-auto-tritanopia.css
deleted file mode 100644
index 256a7038a2..0000000000
--- a/web_src/css/themes/theme-forgejo-auto-tritanopia.css
+++ /dev/null
@@ -1,2 +0,0 @@
-@import "theme-forgejo-light-tritanopia.css";
-@import "theme-forgejo-dark-tritanopia.css" (prefers-color-scheme: dark);
diff --git a/web_src/css/themes/theme-forgejo-dark-deuteranopia-protanopia.css b/web_src/css/themes/theme-forgejo-dark-deuteranopia-protanopia.css
deleted file mode 100644
index e0765aba4a..0000000000
--- a/web_src/css/themes/theme-forgejo-dark-deuteranopia-protanopia.css
+++ /dev/null
@@ -1,9 +0,0 @@
-@import "./theme-forgejo-dark.css";
-
-:root {
-  /* removed rows/words: use red colors from vanilla forgejo-dark */
-  --color-diff-added-word-bg: #214d88;
-  --color-diff-added-row-border: #214d88;
-  --color-diff-added-row-bg: #18184f;
-  --color-code-bg: #0d1117;
-}
diff --git a/web_src/css/themes/theme-forgejo-dark-tritanopia.css b/web_src/css/themes/theme-forgejo-dark-tritanopia.css
deleted file mode 100644
index e4fc303481..0000000000
--- a/web_src/css/themes/theme-forgejo-dark-tritanopia.css
+++ /dev/null
@@ -1,9 +0,0 @@
-@import "./theme-forgejo-dark.css";
-
-:root {
-  /* removed rows/words: use red colors from vanilla forgejo-dark */
-  --color-diff-added-word-bg: #214d88;
-  --color-diff-added-row-border: #214d88;
-  --color-diff-added-row-bg: #152846;
-  --color-code-bg: #0d1117;
-}
diff --git a/web_src/css/themes/theme-forgejo-light-deuteranopia-protanopia.css b/web_src/css/themes/theme-forgejo-light-deuteranopia-protanopia.css
deleted file mode 100644
index 8744cbb581..0000000000
--- a/web_src/css/themes/theme-forgejo-light-deuteranopia-protanopia.css
+++ /dev/null
@@ -1,11 +0,0 @@
-@import "./theme-forgejo-light.css";
-
-:root {
-  --color-diff-removed-word-bg: #c8c850;
-  --color-diff-removed-row-border: #c8c850;
-  --color-diff-removed-row-bg: #ffecc4;
-  --color-diff-added-word-bg: #b8c0ff;
-  --color-diff-added-row-border: #b8c0ff;
-  --color-diff-added-row-bg: #e0e0ff;
-  --color-code-bg: #ffffff;
-}
diff --git a/web_src/css/themes/theme-forgejo-light-tritanopia.css b/web_src/css/themes/theme-forgejo-light-tritanopia.css
deleted file mode 100644
index 3f875e4a7f..0000000000
--- a/web_src/css/themes/theme-forgejo-light-tritanopia.css
+++ /dev/null
@@ -1,11 +0,0 @@
-@import "./theme-forgejo-light.css";
-
-:root {
-  --color-diff-removed-word-bg: #ffb8c0;
-  --color-diff-removed-row-border: #ffb8c0;
-  --color-diff-removed-row-bg: #ffd8d8;
-  --color-diff-added-word-bg: #b8c0ff;
-  --color-diff-added-row-border: #b8c0ff;
-  --color-diff-added-row-bg: #c0e8ff;
-  --color-code-bg: #ffffff;
-}