Version: 1.12.2 (user setup)
Commit: c9bef82ace6c67190d0e83820011a2bbd1f793c1
Date: 2019-10-11T04:56:40.634Z
VS Code 1.37.0
Electron: 4.2.9
Chrome: 69.0.3497.128
Node.js: 10.11.0
V8: 6.9.427.31-electron.0
OS: Windows_NT x64 10.0.18362
This is likely an issue because you are using electron v4. The same issue was reported in VSCode (here) and the fix is to upgrade to electron 6.
The left side is ADS and the right side is SSMS.

Temporary workaround is to launch with --force-color-profile srgb
If you installed ADS using the standard installer
C:\Users\<username>\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Azure Data Studio Azure Data Studio shortcut -> properties -> shortcut tab -> target "C:\Users\<username>\AppData\Local\Programs\Azure Data Studio\azuredatastudio.exe" --force-color-profile srgb@SidShetye we'll be updating to Electron 6 in December release. I think that insider builds already have this update.
I had this same issue and like in previous threads it gets fixed with --force-color-profile srgb. It'd be nice if this wouldn't happen. It was working properly until some random Windows' window manager glitch with HDR over DisplayPort (everything gets dim and you've gotta kill dmw.exe to get it back to normal), and then VS Code stayed dim, even after a computer restart. Other apps that were dimmed as well got fixed by just restarting them.
VS Code 1.43
Windows 10.0.18363
I am also experiencing this in 1.43. My situation sounds very similar to @feniworks; I was messing around with surround display and color profiles yesterday, and it seems to have uniquely messed up VS Code, with all other apps recovering.
Seems to have broken in the latest 1.43.0-release for me too, before clicking the "restart to update" it was fine.
I'm still having this issue in 1.33.0-insider, which is using electron 7.1.11. --force-color-profile srgb works as a workaround (though it would be preferable to not have to use it, or have a setting).
Same here

Funnily enough the brightness of the window looks fine if I'm in the process of selecting an area for a screenshot with ShareX.
Update: I have found a fix!
Open the command palette and go to Preferences: Configure Runtime Arguments. From here, look for the setting "disable-color-correct-rendering": true. Change it from true to false. Restart Visual Studio Code.
Same here on VSCodium 1.44
Version: 1.44.0
Commit: 2aae1f26c72891c399f860409176fe435a154b13
Date: 2020-04-09T10:22:06.688Z
Electron: 7.1.11
Chrome: 78.0.3904.130
Node.js: 12.8.1
V8: 7.8.279.23-electron.0
OS: Windows_NT x64 10.0.18363
still have this problem on insider build
Version: 1.45.0-insider (user setup)
Commit: ece7aaee861d7261a728d52ce436c667030ce17d
Date: 2020-05-01T09:46:47.589Z
Electron: 7.2.2
Chrome: 78.0.3904.130
Node.js: 12.8.1
V8: 7.8.279.23-electron.0
OS: Windows_NT x64 10.0.19619
Also having this issue. Claimed to be fixed in Electron 6, but I upgraded to 9.0.4 and no difference, even though config doesn't show 9.0.4. Only happens when HDR enabled on monitor.
Version: 1.46.1 (user setup)
Commit: cd9ea6488829f560dc949a8b2fb789f3cdc05f5d
Date: 2020-06-17T21:13:20.174Z
Electron: 7.3.1
Chrome: 78.0.3904.130
Node.js: 12.8.1
V8: 7.8.279.23-electron.0
OS: Windows_NT x64 10.0.18363
Same problem on latest VS Code, adding in launcher "--force-color-profile srgb" seem to fix the problem. Is it possible to make it configurable option from VSCode, or somewhere else to enable globally for all instances, not just the one launched with shortcut?
Never mind, found it. The property could be set globally in "Preferences: Configure Runtime Arguments".
Same on the below version:
Version: 1.47.2 (system setup)
Commit: 17299e413d5590b14ab0340ea477cdd86ff13daf
Date: 2020-07-15T18:22:06.216Z
Electron: 7.3.2
Chrome: 78.0.3904.130
Node.js: 12.8.1
V8: 7.8.279.23-electron.0
OS: Windows_NT x64 10.0.18363
Resolved by following https://github.com/microsoft/azuredatastudio/issues/8058#issuecomment-612907109 馃憤
Version: 1.47.2 (user setup)
Commit: 17299e413d5590b14ab0340ea477cdd86ff13daf
Date: 2020-07-15T18:22:06.216Z (1 wk ago)
Electron: 7.3.2
Chrome: 78.0.3904.130
Node.js: 12.8.1
V8: 7.8.279.23-electron.0
OS: Windows_NT x64 10.0.19041
Opened "Preferences: Configure Runtime Arguments"
Set: "disable-color-correct-rendering": false
Fixed it.
Most helpful comment
Same here
Funnily enough the brightness of the window looks fine if I'm in the process of selecting an area for a screenshot with ShareX.
Update: I have found a fix!
Open the command palette and go to
Preferences: Configure Runtime Arguments. From here, look for the setting"disable-color-correct-rendering": true. Change it fromtruetofalse. Restart Visual Studio Code.