Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Atmel/ATSAMA5D31/LCDC/OVR1CLUT[32]#0x0
Overlay 1 CLUT Register
Blue Color entry
Green Color entry
Red Color entry
Alpha Color entry
https://github.com/cmsis-svd/cmsis-svd-data