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A Brazilian chemist has figured out how to make a blue dye from red beets. "BeetBlue" is described as "unpatented and free for all to modify." #OpenSource #gardening
https://www.nytimes.com/2020/04/03/science/blue-dye-beets.html
The New York TimesHow Do You Make a Less Toxic Blue Dye? Start With Red Beets
@ReWILDSaatgut and the research paper, also unwalled: https://advances.sciencemag.org/content/6/14/eaaz0421
Their procedure uses some nasty chemicals though... I wonder if we can modify it for the household kitchen 
advances.sciencemag.orgA metal-free blue chromophore derived from plant pigmentsBlue natural pigments are rare, especially among plants. However, flowering species that evolved to attract Hymenoptera pollinators are colored by blue anthocyanin-metal complexes. Plants lacking anthocyanins are pigmented by betalains but are unable to produce blue hues. By extending the π-system of betalains, we designed a photostable and metal-free blue dye named BeetBlue that did not show toxicity to human hepatic and retinal pigment epithelial cells and does not affect zebrafish embryonal development. This chiral dye can be conveniently synthesized from betalamic acid obtained from hydrolyzed red beetroot juice or by enzymatic oxidation of l-dopa. BeetBlue is blue in the solid form and in solution of acidified polar molecular solvents, including water. Its capacity to dye natural matrices makes BeetBlue the prototype of a new class of low-cost bioinspired chromophores suitable for a myriad of applications requiring a blue hue.
@ReWILDSaatgut ahh, probs not now that I look into the reagents/steps 