Twitter’s desktop dark mode has gotten darker, or worse, been changed to light mode. Some users are now seeing that the site’s browser dark mode is getting darker.

The change is part of an update to make the Twitter website respond to the light and dark modes on your OS. If you miss the dark blue, you can bring it back by choosing dim mode (instead of the inky black lights out or the bright default).

If your Twitter switched from dark mode to light, the company says that was n’t supposed to happen. That was caused by a bug, and could’ve happened to you if you had Twitter set to dim or lights out mode but had your OS in light mode.