diff --git a/solutions/typescript/resistor-color-duo/3/resistor-color-duo.ts b/solutions/typescript/resistor-color-duo/3/resistor-color-duo.ts
new file mode 100644
index 0000000..4bea1ad
--- /dev/null
+++ b/solutions/typescript/resistor-color-duo/3/resistor-color-duo.ts
@@ -0,0 +1,17 @@
+type Color = "black" | "brown" | "red" | "orange" | "yellow" | "green" | "blue" | "violet" | "grey" | "white";
+export function decodedValue([first, second]:[Color, Color]):number {
+  const colourCode: Record<string, number>= {
+    "black": 0,
+    "brown": 1,
+    "red": 2,
+    "orange": 3,
+    "yellow": 4,
+    "green": 5,
+    "blue": 6,
+    "violet": 7,
+    "grey": 8,
+    "white": 9
+  };
+  return colourCode[first]*10 + colourCode[second];
+
+}