将M3 Scheme的颜色生成从Cam16Jch重构为Lch。

color-module/src/convert/mod.rs

@@ -2,9 +2,10 @@ use palette::{
     cam16::{Cam16Jch, Parameters},
     convert::FromColorUnclamped,
     luma::Luma,
-    Hsl, IntoColor, IsWithinBounds, Lchuv, Oklab, Oklch, Srgb,
+    Hsl, IntoColor, IsWithinBounds, Lch, Lchuv, Oklab, Oklch, Srgb,
 };
 
+#[allow(dead_code)]
 pub fn map_cam16jch_to_srgb(origin: &Cam16Jch<f32>) -> Srgb {
     let original_xyz = origin.into_xyz(Parameters::default_static_wp(40.0));
     let mut new_srgb = Srgb::from_color_unclamped(original_xyz);
@@ -28,10 +29,36 @@ pub fn map_cam16jch_to_srgb(origin: &Cam16Jch<f32>) -> Srgb {
     }
 }
 
+#[allow(dead_code)]
 pub fn map_cam16jch_to_srgb_hex(origin: &Cam16Jch<f32>) -> String {
     format!("{:x}", map_cam16jch_to_srgb(origin).into_format::<u8>())
 }
 
+pub fn map_lch_to_srgb(origin: &Lch) -> Srgb {
+    let mut new_srgb: Srgb = (*origin).into_color();
+    if new_srgb.is_within_bounds() {
+        return new_srgb;
+    }
+
+    let mut c: f32 = origin.chroma;
+    let original_c = c;
+    let h = origin.hue;
+    let l = origin.l;
+
+    loop {
+        let new_lch = Lch::new(l, c, h);
+        new_srgb = new_lch.into_color();
+        c -= original_c / 1000.0;
+        if c > 0.0 && (new_srgb.is_within_bounds()) {
+            break new_srgb;
+        }
+    }
+}
+
+pub fn map_lch_to_srgb_hex(origin: &Lch) -> String {
+    format!("{:x}", map_lch_to_srgb(origin).into_format::<u8>())
+}
+
 pub fn map_hsl_to_srgb(origin: &Hsl) -> Srgb {
     let mut new_original = Hsl::new(origin.hue, origin.saturation, origin.lightness);
     const FACTOR: f32 = 0.99;