diff --git a/Conversions/RgbHslConversion.js b/Conversions/RgbHslConversion.js
index 7e014f1318..c5cb562f78 100644
--- a/Conversions/RgbHslConversion.js
+++ b/Conversions/RgbHslConversion.js
@@ -22,7 +22,7 @@ const rgbToHsl = (colorRgb) => {
     throw new Error('Input is not a valid RGB color.')
   }
 
-  let colorHsl = colorRgb
+  let colorHsl = [...colorRgb]
 
   let red = Math.round(colorRgb[0])
   let green = Math.round(colorRgb[1])
diff --git a/Conversions/test/RgbHslConversion.test.js b/Conversions/test/RgbHslConversion.test.js
index 5dec4835cd..e63a6bcea7 100644
--- a/Conversions/test/RgbHslConversion.test.js
+++ b/Conversions/test/RgbHslConversion.test.js
@@ -40,4 +40,11 @@ describe('RgbHslConversion', () => {
   ])('Should return the error message.', (colorRgb, expected) => {
     expect(() => rgbToHsl(colorRgb)).toThrowError(expected)
   })
+
+  test('Should not mutate the input array.', () => {
+    const colorRgb = [24, 98, 118]
+    const result = rgbToHsl(colorRgb)
+    expect(colorRgb).toEqual([24, 98, 118])
+    expect(result).not.toBe(colorRgb)
+  })
 })