I got this error and it wont let me click away 
https://gyazo.com/fdd9077fff829aca6f7b4d7e486a3711.gif
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That looks unrelated to the dark theme. “Timed out” usually means that you’re having internet problems. Either Roblox Studio or Roblox Studio Mod Manager took too long to make a request and “timed out” because it took too much time. Make sure that your internet is connected properly.
You can close the program in the Task Manager. You can open the Task Manager…
- from the Start Menu
- from right clicking the task bar
- or from the shortcut
Ctrl+Shift+Esc
Then you can Right click -> End Task on either Roblox Studio, Roblox Studio Mod Manager, or both. If that doesn’t work, then you can force it to close by using “End Task” from “Details” instead of “Processes”.
It’s not clear whether this caused by Roblox Studio or if it it’s caused by Roblox Studio Mod Manager. If the Mod Manager is not working for you then you can try the ClientSettings folder method, which is simpler. If neither method works, then it probably has nothing to do with the dark theme and has everything to do with your internet connection or Roblox install.
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It’s a Studio Mod Manager error for when it can’t pull the fast flags from the executable – unrelated to internet. @KFCPhoeyu Try closing all instances of Studio and re-opening mod manager, and then re-running the scan.
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I don’t think so. Windows likes to hide file names to make things “easier”. That file is likely called ClientAppSettings.json.txt . It should be called ClientAppSettings.json .
You can turn on viewing file extensions in the View tab:
Once that’s done, you’ll need to rename the file from ClientAppSettings.json.txt to ClientAppSettings.json. Windows will complain:
Press “Yes”.
Once your file is actually named ClientAppSettings.json, you should be good to go. You can turn off file name extensions if you want, or leave them on if you don’t mind seeing the more technical side of things.
You’ll have to turn on the theme in Studio’s settings, which are under File -> Settings:
It should show up in the Studio settings under General:
If it does not show up then make sure you named everything correctly and that your ClientAppSettings.json file has the correct text in it, then restart Roblox.
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thanks it works i didnt know i had to toggle file name extension
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I don’t know man, something about this theme just feels off, maybe it’s just the choice of colour? I’m not too sure.
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It might be since no ones really used to studio having a dark theme, the unknown always seems a bit off.
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I just compared it to some other programs that have dark themes and the Roblox theme just looks super flat and undefined in comparison, here’s an example:
Roblox vs a program I use for music production
It’s great that Roblox finally added one, but I hope we will be able to make our own themes 
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Honestly, the latter looks way more flat and undefined to me than Roblox Studio does. I think it’s just preference.
custom themes would be cool though
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I guess it just comes down to preference. I assume the “flat” is about this:
I like how the dark theme is now with the grey color scheme they currently have, it reminds me of discord’s dark theme. But some people will be a bit more picky and would like to be able to change the theme colors to their liking just how we can change script editor colors so hopefully that will become an option soon in the future.
Overall good job studio team, I am loving this update! 
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Thank You Kanye, Very Cool!
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I believe Dark Theme is out!
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This is true
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The only nitpick I have is like how @Dev_Ryan said, shades currently don’t have enough contrast.
Being able to change UI colors ourselves would be magical though.
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You may want to update this post saying that it’s released so people stop messing with FastFlags
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Use World Space seems to still have a few issues with the icon 
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If I were you I’d probably post that on this Dark Mode issues thread as Roblox staff are more likely to catch it there than in a reply to a community tutorial.
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When I go into Studio Mod Manager, it doesn’t show “Edit FVaribles”. Instead, it shows “Edit Fast Flags”. Also, when I click on that and search “StudioThemeSwitchingEnabled”, it says that nothing was found.
This tutorial is over 3 years old – dark theme is no longer hidden behind an FFlag (and hasn’t been for years). Just go into your settings!
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