Storing data as mixtures of fluorescent dyes

https://www.acs.org/content/acs/en/pressroom/presspacs/2021/acs-presspac-october-13-2021/storing-data-as-mixtures-of-fluorescent-dyes-video.html

"The fluorescent data could be read 1,000 times without a significant loss in intensity. The researchers also demonstrated the technique’s ability to write and read an image of Faraday. The strategy has a read rate of 469 bits/s, which is the fastest reported for any molecular information storage method, the researchers say" Unfortunately each colored bit is only binary. Should instead be octal or hex or more!