Can anyone offer advice on white staining on blue towels?

I just purchased new blue towels for my kid's bathroom. After washing the towels and using them for a few days, the towels now have have white staining on them. Someone suggested that maybe it had something to do with the laundry detergent. I am using Tide HE with a touch of Downy fabric softner. There is no bleach in the Tide as far as I know but it almost looks like areas of the towels have been bleached? Anyone else experience this problem with their towels?
 
sad I’m upset
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