增加向HCT颜色空间的双向转换。

color-module/src/lib.rs

@@ -1,8 +1,11 @@
 use std::str::FromStr;
 
 use palette::{
-    color_difference::Wcag21RelativeContrast, color_theory::*, convert::FromColorUnclamped, Darken,
-    FromColor, Hsl, IsWithinBounds, Lab, Lighten, Mix, Oklch, ShiftHue, Srgb,
+    cam16::{Cam16Jch, Parameters},
+    color_difference::Wcag21RelativeContrast,
+    color_theory::*,
+    convert::FromColorUnclamped,
+    Darken, FromColor, Hsl, IntoColor, IsWithinBounds, Lab, Lighten, Mix, Oklch, ShiftHue, Srgb,
 };
 use wasm_bindgen::prelude::*;
 
@@ -87,6 +90,31 @@ pub fn oklch_to_hex(l: f32, c: f32, h: f32) -> Result<String, errors::ColorError
     Ok(format!("{:x}", srgb.into_format::<u8>()))
 }
 
+#[wasm_bindgen]
+pub fn represent_hct(color: &str) -> Result<Box<[f32]>, errors::ColorError> {
+    let origin_color = Srgb::from_str(color)
+        .map_err(|_| errors::ColorError::UnrecogniazedRGB(color.to_string()))?
+        .into_format::<f32>();
+    let extra_parameters = Parameters::default_static_wp(40.0);
+    let hct = Cam16Jch::from_xyz(origin_color.into_color(), extra_parameters);
+    Ok(Box::new([
+        hct.hue.into_positive_degrees(),
+        hct.chroma,
+        hct.lightness,
+    ]))
+}
+
+#[wasm_bindgen]
+pub fn hct_to_hex(hue: f32, chroma: f32, tone: f32) -> Result<String, errors::ColorError> {
+    let extra_parameters = Parameters::default_static_wp(40.0);
+    let hct = Cam16Jch::new(tone, chroma, hue);
+    let srgb = Srgb::from_color_unclamped(hct.into_xyz(extra_parameters));
+    if !srgb.is_within_bounds() {
+        return Err(errors::ColorError::ComponentOutOfBounds);
+    }
+    Ok(format!("{:x}", srgb.into_format::<u8>()))
+}
+
 #[wasm_bindgen]
 pub fn shift_hue(color: &str, degree: f32) -> Result<String, errors::ColorError> {
     let origin_color = Srgb::from_str(color)