diff --git a/gtk/gtkcolorutils.c b/gtk/gtkcolorutils.c
index dfe2dce13d..4abcddbdc0 100644
--- a/gtk/gtkcolorutils.c
+++ b/gtk/gtkcolorutils.c
@@ -229,6 +229,32 @@ gtk_rgb_to_hsv (float  r, float  g, float  b,
     *v = b;
 }
 
+void
+gtk_rgb_to_hsl (float  red, float  green,      float  blue,
+                float *hue, float *saturation, float *lightness)
+{
+  GdkHSLA hsla;
+
+  _gdk_hsla_init_from_rgba (&hsla, &(GdkRGBA) { red, green, blue, 1.0 });
+
+  *hue = hsla.hue;
+  *saturation = hsla.saturation;
+  *lightness = hsla.lightness;
+}
+
+void
+gtk_hsl_to_rgb (float  hue, float  saturation, float  lightness,
+                float *red, float *green,      float *blue)
+{
+  GdkRGBA rgba;
+
+  _gdk_rgba_init_from_hsla (&rgba, &(GdkHSLA) { hue, saturation, lightness, 1.0 });
+
+  *red = rgba.red;
+  *green = rgba.green;
+  *blue = rgba.blue;
+}
+
 void
 gtk_rgb_to_hwb (float  red, float  green, float blue,
                 float *hue, float *white, float *black)
@@ -320,8 +346,8 @@ unapply_gamma (float v)
 }
 
 void
-gtk_oklab_to_rgb (float  L,   float  a,     float  b,
-                  float *red, float *green, float *blue)
+gtk_oklab_to_linear_srgb (float  L,   float  a,     float  b,
+                          float *red, float *green, float *blue)
 {
   float l = L + 0.3963377774f * a + 0.2158037573f * b;
   float m = L - 0.1055613458f * a - 0.0638541728f * b;
@@ -331,24 +357,27 @@ gtk_oklab_to_rgb (float  L,   float  a,     float  b,
   m = powf (m, 3);
   s = powf (s, 3);
 
-  float linear_red = +4.0767416621f * l - 3.3077115913f * m + 0.2309699292f * s;
-  float linear_green = -1.2684380046f * l + 2.6097574011f * m - 0.3413193965f * s;
-  float linear_blue = -0.0041960863f * l - 0.7034186147f * m + 1.7076147010f * s;
+  *red = +4.0767416621f * l - 3.3077115913f * m + 0.2309699292f * s;
+  *green = -1.2684380046f * l + 2.6097574011f * m - 0.3413193965f * s;
+  *blue = -0.0041960863f * l - 0.7034186147f * m + 1.7076147010f * s;
+}
 
+void
+gtk_oklab_to_rgb (float  L,   float  a,     float  b,
+                  float *red, float *green, float *blue)
+{
+  float linear_red, linear_green, linear_blue;
+  gtk_oklab_to_linear_srgb (L, a, b, &linear_red, &linear_green, &linear_blue);
   gtk_linear_srgb_to_rgb (linear_red, linear_green, linear_blue, red, green, blue);
 }
 
 void
-gtk_rgb_to_oklab (float  red, float  green, float  blue,
-                  float *L,   float *a,     float *b)
+gtk_linear_srgb_to_oklab (float  red, float  green, float  blue,
+                          float *L,   float *a,     float *b)
 {
-  float linear_red, linear_green, linear_blue;
-
-  gtk_rgb_to_linear_srgb (red, green, blue, &linear_red, &linear_green, &linear_blue);
-
-  float l = 0.4122214708f * linear_red + 0.5363325363f * linear_green + 0.0514459929f * linear_blue;
-  float m = 0.2119034982f * linear_red + 0.6806995451f * linear_green + 0.1073969566f * linear_blue;
-  float s = 0.0883024619f * linear_red + 0.2817188376f * linear_green + 0.6299787005f * linear_blue;
+  float l = 0.4122214708f * red + 0.5363325363f * green + 0.0514459929f * blue;
+  float m = 0.2119034982f * red + 0.6806995451f * green + 0.1073969566f * blue;
+  float s = 0.0883024619f * red + 0.2817188376f * green + 0.6299787005f * blue;
 
   l = cbrtf (l);
   m = cbrtf (m);
@@ -359,6 +388,15 @@ gtk_rgb_to_oklab (float  red, float  green, float  blue,
   *b = 0.0259040371f*l + 0.7827717662f*m - 0.8086757660f*s;
 }
 
+void
+gtk_rgb_to_oklab (float  red, float  green, float  blue,
+                  float *L,   float *a,     float *b)
+{
+  float linear_red, linear_green, linear_blue;
+  gtk_rgb_to_linear_srgb (red, green, blue, &linear_red, &linear_green, &linear_blue);
+  gtk_linear_srgb_to_oklab (linear_red, linear_green, linear_blue, L, a, b);
+}
+
 void
 gtk_rgb_to_linear_srgb (float  red,        float  green,        float  blue,
                         float *linear_red, float *linear_green, float *linear_blue)
diff --git a/gtk/gtkcolorutilsprivate.h b/gtk/gtkcolorutilsprivate.h
index 151e5a003e..39f81fdf32 100644
--- a/gtk/gtkcolorutilsprivate.h
+++ b/gtk/gtkcolorutilsprivate.h
@@ -21,7 +21,12 @@
 
 G_BEGIN_DECLS
 
-void gtk_rgb_to_hwb (float  red, float  green, float blue,
+void gtk_rgb_to_hsl (float  red, float  green,      float  blue,
+                     float *hue, float *saturation, float *lightness);
+void gtk_hsl_to_rgb (float  hue, float  saturation, float  lightness,
+                     float *red, float *green,      float *blue);
+
+void gtk_rgb_to_hwb (float  red, float  green, float  blue,
                      float *hue, float *white, float *black);
 void gtk_hwb_to_rgb (float  hue, float  white, float  black,
                      float *red, float *green, float *blue);
@@ -31,6 +36,11 @@ void gtk_oklab_to_oklch (float  L,  float  a, float  b,
 void gtk_oklch_to_oklab (float  L,  float  C, float  H,
                          float *L2, float *a, float *b);
 
+void gtk_oklab_to_linear_srgb (float  L,   float  a,     float  b,
+                               float *red, float *green, float *blue);
+void gtk_linear_srgb_to_oklab (float  red, float  green, float  blue,
+                               float *L,   float *a,     float *b);
+
 void gtk_oklab_to_rgb (float  L,   float  a,     float  b,
                        float *red, float *green, float *blue);
 void gtk_rgb_to_oklab (float  red, float  green, float  blue,
@@ -41,5 +51,6 @@ void gtk_rgb_to_linear_srgb (float  red,        float  green,        float  blue
 void gtk_linear_srgb_to_rgb (float  linear_red, float  linear_green, float  linear_blue,
                              float *red,        float *green,        float *blue);
 
+
 G_END_DECLS