diff --git a/.changeset/brown-towns-find.md b/.changeset/brown-towns-find.md
new file mode 100644
index 0000000000..c3244d9427
--- /dev/null
+++ b/.changeset/brown-towns-find.md
@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-api-docs': patch
+---
+
+Fixed invisible text in parameter input fields when using dark mode in OpenAPI definition pages
diff --git a/plugins/api-docs/src/components/OpenApiDefinitionWidget/OpenApiDefinition.tsx b/plugins/api-docs/src/components/OpenApiDefinitionWidget/OpenApiDefinition.tsx
index 7279575842..ac7f31ee81 100644
--- a/plugins/api-docs/src/components/OpenApiDefinitionWidget/OpenApiDefinition.tsx
+++ b/plugins/api-docs/src/components/OpenApiDefinitionWidget/OpenApiDefinition.tsx
@@ -173,6 +173,16 @@ const useStyles = makeStyles(theme => ({
         {
           color: theme.palette.warning.dark,
         },
+      [`& input[type=text],
+          & input[type=password],
+          & input[type=email],
+          & input[type=number],
+          & textarea,
+          & select`]: {
+        backgroundColor: theme.palette.background.paper,
+        color: theme.palette.text.primary,
+        borderColor: theme.palette.divider,
+      },
     },
   },
 }));