welcome! I am not sure how noticeable it to others... I have quite bad vision and use weak glasses for reading when I'm at home. It can also look different depending on screen size or window/full-screen option. I played of full screen.
I used to study webdev years ago, which led me to research accessibility/usability. I tend to wonder how impairments can affect gameplay experience, for example lack of sound while playing horror survival can be day and night for game difficulty. It can be worth reading on that stuff. With vision impairment it is a bit tricky, some people do not see certain colors, so it is not exactly about what colors get lost on background for normal user.