diff --git a/src/utils/generateTagIndex.ts b/src/utils/generateTagIndex.ts
new file mode 100644
index 00000000..333c649e
--- /dev/null
+++ b/src/utils/generateTagIndex.ts
@@ -0,0 +1,9 @@
+const NUM_TAG_COLORS = 16;
+
+const generateTagIndex = (tag: string) => {
+  const asciiList = tag.split('').map((c) => c.charCodeAt(0));
+  const sum = asciiList.reduce((a, b) => a + b, 0);
+  return sum % NUM_TAG_COLORS;
+};
+
+export default generateTagIndex;