diff --git a/.changeset/chubby-suns-film.md b/.changeset/chubby-suns-film.md
new file mode 100644
index 0000000000..440d65d707
--- /dev/null
+++ b/.changeset/chubby-suns-film.md
@@ -0,0 +1,5 @@
+---
+'@backstage/ui': patch
+---
+
+Fixed dark theme `--bui-fg-secondary` and `--bui-fg-disabled` tokens using black-based `oklch(0% ...)` instead of white-based `oklch(100% ...)`, making secondary and disabled text visible on dark backgrounds.
diff --git a/packages/ui/src/css/tokens.css b/packages/ui/src/css/tokens.css
index f889b4cb7c..4f5cb08bfb 100644
--- a/packages/ui/src/css/tokens.css
+++ b/packages/ui/src/css/tokens.css
@@ -183,8 +183,8 @@
 
     /* Foreground colors */
     --bui-fg-primary: var(--bui-white);
-    --bui-fg-secondary: oklch(0% 0 0 / 50%);
-    --bui-fg-disabled: oklch(0% 0 0 / 28%);
+    --bui-fg-secondary: oklch(100% 0 0 / 50%);
+    --bui-fg-disabled: oklch(100% 0 0 / 28%);
     --bui-fg-solid: #101821;
     --bui-fg-solid-disabled: #6191cc;