How can I remove blue tint on my Apple Watch screen?

30 days ago I purchased a new apple watch 10 , my 5 was great just wanted an upgrade. I put my apple watch 5 in a box to eventually send to my grandson to use when I knew I wanted to keep the 10 after 30 days. I took My apple watch 5 out of box to charge it before shipment and noticed my screen has a blue tint to it now which was fine upon boxing it, What happened here?

Thanks

Tom

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