Update theme.py

theme.py

@@ -58,8 +58,8 @@ class Theme(Base):
             button_primary_background_fill="#66814a",
             button_primary_background_fill_hover='*primary_200',
             button_primary_text_color="white",
-            button_primary_background_fill_dark="*neutral_600",
-            button_primary_background_fill_hover_dark="*neutral_600",
+            button_primary_background_fill_dark="gray",
+            button_primary_background_fill_hover_dark="gray",
             button_primary_text_color_dark="white",
             button_secondary_background_fill="*button_primary_background_fill",
             button_secondary_background_fill_hover="*button_primary_background_fill_hover",