diff --git a/web_src/css/themes/theme-forgejo-dark-deuteranopia-protanopia.css b/web_src/css/themes/theme-forgejo-dark-deuteranopia-protanopia.css
index b30cfd6b23..e0765aba4a 100644
--- a/web_src/css/themes/theme-forgejo-dark-deuteranopia-protanopia.css
+++ b/web_src/css/themes/theme-forgejo-dark-deuteranopia-protanopia.css
@@ -1,11 +1,9 @@
 @import "./theme-forgejo-dark.css";
 
 :root {
-  --color-diff-removed-word-bg: #693f17;
-  --color-diff-removed-row-border: #693f17;
-  --color-diff-removed-row-bg: #221b17;
+  /* 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: #13233a;
+  --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
index aefdaa1bf7..e4fc303481 100644
--- a/web_src/css/themes/theme-forgejo-dark-tritanopia.css
+++ b/web_src/css/themes/theme-forgejo-dark-tritanopia.css
@@ -1,11 +1,9 @@
 @import "./theme-forgejo-dark.css";
 
 :root {
-  --color-diff-removed-word-bg: #792e2e;
-  --color-diff-removed-row-border: #792e2e;
-  --color-diff-removed-row-bg: #25171c;
+  /* 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: #13233a;
+  --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
index eb48b7598d..8744cbb581 100644
--- a/web_src/css/themes/theme-forgejo-light-deuteranopia-protanopia.css
+++ b/web_src/css/themes/theme-forgejo-light-deuteranopia-protanopia.css
@@ -1,11 +1,11 @@
 @import "./theme-forgejo-light.css";
 
 :root {
-  --color-diff-removed-word-bg: #ffdbb0;
-  --color-diff-removed-row-border: #ffdbb0;
-  --color-diff-removed-row-bg: #fffaf3;
-  --color-diff-added-word-bg: #b1dbff;
-  --color-diff-added-row-border: #b1dbff;
-  --color-diff-added-row-bg: #eef9ff;
+  --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
index 208da5597f..3f875e4a7f 100644
--- a/web_src/css/themes/theme-forgejo-light-tritanopia.css
+++ b/web_src/css/themes/theme-forgejo-light-tritanopia.css
@@ -1,11 +1,11 @@
 @import "./theme-forgejo-light.css";
 
 :root {
-  --color-diff-removed-word-bg: #ffd0ce;
-  --color-diff-removed-row-border: #ffd0ce;
-  --color-diff-removed-row-bg: #fff5f4;
-  --color-diff-added-word-bg: #b1dbff;
-  --color-diff-added-row-border: #eef9ff;
-  --color-diff-added-row-bg: #eef9ff;
+  --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;
 }