diff --git a/src/dynamic_color/material_dynamic_colors.rs b/src/dynamic_color/material_dynamic_colors.rs
index 2f65eee..26c978e 100644
--- a/src/dynamic_color/material_dynamic_colors.rs
+++ b/src/dynamic_color/material_dynamic_colors.rs
@@ -331,7 +331,7 @@ impl MaterialDynamicColors {
       [tone, scheme] => if _is_monochrome(scheme) { if scheme.is_dark { 30.0 } else { 85.0 } } else if _is_fidelity(scheme) { if scheme.is_dark { 30.0 } else { 90.0 } } else { Self::_find_desired_chroma_by_tone(scheme.secondary_palette.hue(), scheme.secondary_palette.chroma(), if scheme.is_dark { 30.0 } else { 90.0 }, !scheme.is_dark) };
       [background, scheme] => Self::highest_surface(scheme);
       [contrast_curve] => ContrastCurve { low: 1.0, normal: 1.0, medium: 3.0, high: 4.5 };
-      [tone_delta_pair, _scheme] => ToneDeltaPair::new(Self::primary_container(), Self::primary(), 10.0, TonePolarity::Nearer, false);
+      [tone_delta_pair, _scheme] => ToneDeltaPair::new(Self::secondary_container(), Self::secondary(), 10.0, TonePolarity::Nearer, false);
     }
 
     define_key! {
diff --git a/tests/theme.rs b/tests/theme.rs
index 9a43c35..1193438 100644
--- a/tests/theme.rs
+++ b/tests/theme.rs
@@ -22,7 +22,7 @@ fn test_theme() -> Result<(), ParseError> {
             on_primary_fixed_variant: [255, 35, 80, 36],
             secondary: [255, 185, 204, 180],
             on_secondary: [255, 37, 52, 35],
-            secondary_container: [255, 185, 204, 180],
+            secondary_container: [255, 59, 75, 56],
             on_secondary_container: [255, 213, 232, 207],
             secondary_fixed: [255, 213, 232, 207],
             secondary_fixed_dim: [255, 185, 204, 180],