Purple Soda is a name in search of a documented plant. No breeder has published a cultivar called exactly this, and the closest matches on the shelf belong to other lines entirely. What you are buying is a specific grower's batch, not a pedigree.
What The Colour Actually Tells You
Purple in cannabis comes from anthocyanin pigment expression — driven by genetics and pushed by temperature during late flower.
It is a plant trait. It is not a potency signal, not a quality grade, and not evidence of any particular parentage. A deep purple jar and a green one can come off the same cut in two different rooms.
What To Check
For anything sold under this name, the producer, the batch panel and your own tolerance are the only useful inputs. Ask who grew it and what the lab work says.
The High Rise Take
Names like this one are a reminder that the label is marketing and the grower is the product. Buy the room, not the word.