fix: improve accentuate to be visible on semi-light colors

src/scss/mixins/_colors.css

@@ -34,10 +34,10 @@
  }
 
  @function accentuate($color) {
-     @if (luminance($color) > 255 * $whiteness_value) {
+     @if (luminance($color) > 64) {
          @return darken($color, 7.5%);
      } @else {
-         @return lighten($color, 3%);
+         @return lighten($color, 4%);
      }
  }