i bought some from spotlight, it’s bright red and for a kid’s toy.
dyes may run a little. prewash all cottons anyway in hot water by themselves. rinse with vinegar to set the colors.
Cotton fabrics will shrink just a little bit.
They dyes used today are NOT toxic to anyone or the environment. This is why they run and fade so much.
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It should be fine. the worst dyes are industrial dyes, and they are used on your clothes and mass dyed fabric. If you are still worried just wash it once.