Roblox’s blue look is usually tied to the app/account theme, and you can switch it back to a light theme in settings. On mobile, open More , then Settings , then Account Info , scroll to Personal , find Theme , and choose Light ; on browser, use the gear icon in the top-right and do the same.

Quick steps

  1. Log in to the Roblox account.
  1. Go to Settings.
  1. Open Account Info.
  1. Scroll to Personal and find Theme.
  1. Change it from dark/blue-looking mode to Light , then save.

If it still looks blue

Some Roblox Kids screens may still keep a small blue tint even after changing themes, so the color may not disappear completely. If the blue background remains after switching to Light, it may be part of the Kids interface rather than a normal theme setting.

What this means

The common fix is the same: change the account theme to Light. If you are using Roblox Kids and the app still stays blue, the interface may be designed that way and not fully removable.

TL;DR: Go to Roblox settings, change Theme to Light , and save. If a little blue stays on Roblox Kids, that may be normal.