Chat color and Mention color you can't swipe on touch screens

What happens if you tap in the selection box for the color?
It is not clear what you mean by "swipe" here?

sorry I'm so bad at English

here's the photo

so you need to default back to pick 

color white or other colors

Thank you for your report!
We're tracking this issue in MCPE-51509, so this ticket is being resolved and linked as a duplicate.

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