new tab page hilighted

this might be an extremely dumb question and I apologies if it is but whenever I open the new tab page the page has a night shift variant. this also happens whenever I hover over the x button on different tabs. This has never happened to me before until tonight.

Hi @zach15001, Welcome to Community!
I need some clarification. Are you saying the whole tab highlights of just the x ?
Are you using the default night/dark mode or a custom theme?

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