diff --git a/src/themes/erDiagram-oldHardcodedValues.ts b/src/themes/erDiagram-oldHardcodedValues.ts
new file mode 100644
index 000000000..24b7de7fd
--- /dev/null
+++ b/src/themes/erDiagram-oldHardcodedValues.ts
@@ -0,0 +1,8 @@
+/**
+ * @file Values that have been hardcoded in src/diagrams/er/styles.js. These can be used by
+ *   theme-_._ files to maintain display styles until themes, styles, renderers are revised. --
+ *   2022-09-22
+ */
+export const oldAttributeBackgroundColorOdd = '#ffffff';
+export const oldAttributeBackgroundColorEven = '#f2f2f2';
+export const oldAttributeBoxTextColor = '#ff0000';