Update app.py

app.py

@@ -21,7 +21,7 @@ with gr.Blocks(
         neutral_hue="gray",
         text_size="lg"
     ).set(
-        background_fill_primary='*neutral_200',
+        background_fill_primary='*neutral_500',
         background_fill_secondary='neutral_100',
         background_fill_secondary_dark='secondary_200',
         border_color_accent='*secondary_400',
@@ -30,7 +30,7 @@ with gr.Blocks(
         color_accent_soft='*secondary_200',
         color_accent_soft_dark='*neutral_800',
         button_primary_background_fill='*secondary_500',
-        button_primary_background_fill_dark='*secondary_200'
+        button_primary_background_fill_dark='*secondary_500'
     )
 
 ) as demo:  # This is the correct place for 'as demo'