diff --git a/theme-github-auto.css b/theme-github-auto.css
index e55da04..08ca109 100644
--- a/theme-github-auto.css
+++ b/theme-github-auto.css
@@ -372,6 +372,12 @@
   .ui.ui.ui.grey.label {
     line-height: 10px;
   }
+
+  /* yes/no dialog buttons for repo archival */
+  .ui.basic.inverted.buttons .button,
+  .ui.basic.inverted.button {
+    color: #f9fafb !important;
+  }
 }
 @media (prefers-color-scheme: dark) {
   :root {
diff --git a/theme-github.css b/theme-github.css
index e9b3e69..014cbe9 100644
--- a/theme-github.css
+++ b/theme-github.css
@@ -366,3 +366,9 @@ a.muted {
 .ui.ui.ui.grey.label {
   line-height: 10px;
 }
+
+/* yes/no dialog buttons for repo archival */
+.ui.basic.inverted.buttons .button,
+.ui.basic.inverted.button {
+  color: #f9fafb !important;
+}