diff --git a/color-module/src/lib.rs b/color-module/src/lib.rs
index eca9a68..d4f08f2 100644
--- a/color-module/src/lib.rs
+++ b/color-module/src/lib.rs
@@ -92,8 +92,8 @@ pub fn shift_hue(color: &str, degree: f32) -> Result<String, errors::ColorError>
     let origin_color = Srgb::from_str(color)
         .map_err(|_| errors::ColorError::UnrecogniazedRGB(color.to_string()))?
         .into_format::<f32>();
-    let hsl = Hsl::from_color(origin_color);
-    let shifted_color = hsl.shift_hue(degree);
+    let oklch = Oklch::from_color(origin_color);
+    let shifted_color = oklch.shift_hue(degree);
     let srgb = Srgb::from_color(shifted_color);
     Ok(format!("{:x}", srgb.into_format::<u8>()))
 }
@@ -103,8 +103,8 @@ pub fn lighten(color: &str, percent: f32) -> Result<String, errors::ColorError>
     let origin_color = Srgb::from_str(color)
         .map_err(|_| errors::ColorError::UnrecogniazedRGB(color.to_string()))?
         .into_format::<f32>();
-    let hsl = Hsl::from_color(origin_color);
-    let lightened_color = hsl.lighten(percent);
+    let oklch = Oklch::from_color(origin_color);
+    let lightened_color = oklch.lighten(percent);
     let srgb = Srgb::from_color(lightened_color);
     Ok(format!("{:x}", srgb.into_format::<u8>()))
 }
@@ -114,8 +114,8 @@ pub fn lighten_absolute(color: &str, value: f32) -> Result<String, errors::Color
     let origin_color = Srgb::from_str(color)
         .map_err(|_| errors::ColorError::UnrecogniazedRGB(color.to_string()))?
         .into_format::<f32>();
-    let hsl = Hsl::from_color(origin_color);
-    let lightened_color = hsl.lighten_fixed(value);
+    let oklch = Oklch::from_color(origin_color);
+    let lightened_color = oklch.lighten_fixed(value);
     let srgb = Srgb::from_color(lightened_color);
     Ok(format!("{:x}", srgb.into_format::<u8>()))
 }
@@ -125,8 +125,8 @@ pub fn darken(color: &str, percent: f32) -> Result<String, errors::ColorError> {
     let origin_color = Srgb::from_str(color)
         .map_err(|_| errors::ColorError::UnrecogniazedRGB(color.to_string()))?
         .into_format::<f32>();
-    let hsl = Hsl::from_color(origin_color);
-    let darkened_color = hsl.darken(percent);
+    let oklch = Oklch::from_color(origin_color);
+    let darkened_color = oklch.darken(percent);
     let srgb = Srgb::from_color(darkened_color);
     Ok(format!("{:x}", srgb.into_format::<u8>()))
 }
@@ -136,8 +136,8 @@ pub fn darken_absolute(color: &str, value: f32) -> Result<String, errors::ColorE
     let origin_color = Srgb::from_str(color)
         .map_err(|_| errors::ColorError::UnrecogniazedRGB(color.to_string()))?
         .into_format::<f32>();
-    let hsl = Hsl::from_color(origin_color);
-    let darkened_color = hsl.darken_fixed(value);
+    let oklch = Oklch::from_color(origin_color);
+    let darkened_color = oklch.darken_fixed(value);
     let srgb = Srgb::from_color(darkened_color);
     Ok(format!("{:x}", srgb.into_format::<u8>()))
 }