colorimeter
as7262 as7341
https://www.youtube.com/watch?v=CTWAyia3YDw
https://www.amazon.com.au/Color-Muse-color-matching-paint/dp/B01KKEMIF0/ref=asc_df_B01KKEMIF0/
spectrum to rgb https://github.com/ampretia/spectrum-rgb
https://learn.adafruit.com/adafruit-as7262-6-channel-visible-light-sensor