Dyeing and Coloration
History
Perhaps the oldest known dye for fabric is produced from the Ṣef̂ǒl flower; the extremely vivid yellow color has been used as a paint to mark hazardous zones such as teleportation fields, and has been painted or dyed onto fabric in specific patterns designated by tradition, law, and practicality.
Using similar processes, however, the members of the Red-Green Vision Community have been able to dye fabrics in other colors, and have settled on their own preferred sources of color to counterbalance the naturally dark threads used to weave fabric. The patterns used by the community are much more mutable, but other Stenza can often use the funky and often irregular splotches on their garments to distinguish them.
Execution
For Ṣef̂ǒl in particular, see Use of Ṣef̂ǒl Dye in Uniform
As a rule, Stenza do not dye skeins of spun yarn, instead waiting until the cloth has been woven before dying or painting it in specific patterns (including the paint splatter designs that are currently in vogue with the Red-Green Vision Community).
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Dyeing, yay! I love how the Stenza started to dye, because they found the yellow flower and thought it would be good to designate people who worked on hazardous stuff. I love the description of the dyeing process too. :)
Lots of things you just take to because they work for you. And I like to root these processes in what humans do in the real world. Like, aliens may not think like us or reproduce like us or what have you, but some of these things are so simple as to be nearly universal (spinning, for example).