Paint hero decoration as a solid darker-accent fill.

Figma uses a normal fill, not opacity, stacked paths, or multiply grain.

Co-authored-by: Cursor <cursoragent@cursor.com>

stories/sections/HeroDecor.stories.js

@@ -8,7 +8,7 @@ export default {
     docs: {
       description: {
         component:
-          "A decorative SVG component that provides background visual elements for the HeroBanner. Features grain effects and organic shapes that enhance the visual appeal without interfering with content readability.",
+          "A decorative SVG component that provides background visual elements for the HeroBanner. Organic shapes sit behind content using the brand darker-accent fill.",
       },
     },
   },