Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/STMicroelectronics/STM32F7x8/LTCD/L2DCCR#0x0
Layerx Default Color Configuration Register
Default Color Blue
Default Color Green
Default Color Red
Default Color Alpha
https://github.com/cmsis-svd/cmsis-svd-data