Any company selling seeds for a purple pumpkin is trying to scam you. The "photos" are a mix of photo-edits and generative Ai. Buy nothing from them.

The entire plant family that squash is from (Curcurbiteae) lack the genes for the enzymes required to produce this color.

https://pureasiaseeds.com/en-us/products/purple-pumpkin-seeds-for-planting-heirloom-non-gmo-high-germination-organic-garden-seeds