Updated onSurfaceVariant color for better contrast ratio in 2025 specs.

Signed-off-by: Andy Scherzinger <[email protected]>

Author: AndyScherzinger

material-color-utilities/src/main/java/dynamiccolor/ColorSpec2025.java

@@ -471,7 +471,10 @@ public DynamicColor onSurfaceVariant() {
                   }
                 })
             .setContrastCurve(
-                (s) -> s.platform == PHONE ? getContrastCurve(4.5) : getContrastCurve(7))
+                (s) ->
+                    s.platform == PHONE
+                        ? (s.isDark ? getContrastCurve(6) : getContrastCurve(4.5))
+                        : getContrastCurve(7))
             .build();
     return super.onSurfaceVariant().toBuilder()
         .extendSpecVersion(SpecVersion.SPEC_2025, color2025)