Accessibility button goes yellow when hovering over quit game button.

I cannot reproduce this with the instructions you provided.

@violine1101 Just checked by launching the game, button still turns yellow after launch, do you want me to add the game settings to the issue?

Do you use any resource packs?

no

Can you please force a debug crash by pressing F3 + C for 10 seconds while in-game and attach the crash report ([minecraft/crash-reports/crash-<DATE>-client.txt|http://hopper.minecraft.net/help/guides/finding-minecraft-data-folder]) here.

Once attached, the report will be reopened automatically.

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attached

Thanks. This might have something to do with your graphics card. That's just an assumption though, but your crash report will hopefully provide all the information needed for the devs if they take a look at this.

That Language button goes yellow when hovering over Minecraft Realms button too

This is a 11 years old graphics card and therefore the drivers are badly outdated as well. It is almost certain that this is a driver issue,

Please check if this is still an issue for you in 1.16-rc1 or later. If so, please force a crash by pressing F3 + C for 10 seconds while in-game and attach the crash report (minecraft/crash-reports/crash-<DATE>-client.txt) here.