Unless something is brand new (which should get its own like-color wash to knock out any loose dyes), wash on cold water and you’ll be fine tbh. If your whites start to get a little dingy then you could do a separate whites bleach wash every once in a while. But honestly I don’t have enough clothes to be separating them, it would result in very small laundry loads which feel like a waste of time and resources (water, energy, etc).