This page uses shadcn CSS variables. The primary color is set to:
+--primary: 222.2 47.4% 11.2%
+ Once the userscript runs, these boxes will display with MCU colors:
+ +--mcu-surface and
+ --mcu-on-surface
+ --mcu-primary and
+ --mcu-on-primary
+ --mcu-secondary-container and
+ --mcu-on-secondary-container
+
+ After the userscript runs, check the computed styles to see all
+ available --mcu-* variables.
+