refactor: extract areColorsSimilar() function

src/utils/color.ts

@@ -0,0 +1,22 @@
+export function areColorsSimilar(
+  color1: [number, number, number],
+  color2: [number, number, number],
+  similarity: number
+): boolean {
+  const colorDistance = (
+    c1: [number, number, number],
+    c2: [number, number, number]
+  ) => {
+    return Math.sqrt(
+      Math.pow(c1[0] - c2[0], 2) +
+        Math.pow(c1[1] - c2[1], 2) +
+        Math.pow(c1[2] - c2[2], 2)
+    );
+  };
+  const maxColorDistance = Math.sqrt(
+    Math.pow(255, 2) + Math.pow(255, 2) + Math.pow(255, 2)
+  );
+  const similarityThreshold = (similarity / 100) * maxColorDistance;
+
+  return colorDistance(color1, color2) <= similarityThreshold;
+}