Sure, these damn weeds:
L pantanal, L cuba, L arcuata

All at high NO3, 30ppm etc
Also note the red color without CO2.
Then look at the lighter color with CO2.

Developmentally, the plant can produce a lot more Red color if .........it's grown better. While less CO2 will help slow growth, at 1.5 to 1.6w/gal of T8 lighting in a large tank can go either way, but a plant can produce more anthocyanins if it has more carbon as those colored pigments are mainly unsaturated carbon chains.


Regards,
Tom Barr