Minor color patch

src/dark/_color.defaults.scss

@@ -170,7 +170,7 @@ $theme-dark: map-merge((
     color-bg-btn-primary-hover: $color-blue-200,
     color-bg-btn-primary-focus: $color-blue-200,
     color-bg-btn-primary-pressed-selected: $color-blue-300,
-    color-bg-btn-primary-disabled: $color-grey-1100,
+    color-bg-btn-primary-disabled: $color-grey-200,
 
     color-bg-btn-danger-rest: $color-red-400,
     color-bg-btn-danger-hover: $color-red-500,