Is it possible to change color of the scrollbar in Chromium browser, without having to install yet another extension?

Perhaps by modifying some css file somewhere?

I am using chromium 83 on Debian 10.

I know how to achieve this in Firefox. I just added following lines to userContent.css

    scrollbar-color: #B63C29 #555555 !important;

Is there something similar I can do to achieve same for Chromium?


I have tried following solution, but it has no effect:

  1. I have created directory ~/.config/chromium/Default/User StyleSheets/
  2. created file Custom.css inside it
  3. added following code to test it:
    .scrollable-element {
      scrollbar-color: red yellow;

Nothing. No effect.

Can somebody please show me simple working example how to change the scrollbar to red?

2 Answers 2


If nothing else works you may need to use some kind of extension after all. Based on this issue and this answer and this one I did that:

$ mkdir CustomCSS && cd CustomCSS
$ cat > manifest.json << EOF
    "name": "My Style Sheet",
    "content_scripts": [
          "matches": ["*://*/*"],
          "css": ["Custom.css"]
    "version": "1.0.0",
    "description": "User StyleSheet replacement",
    "manifest_version": 2
$ cat > Custom.css << EOF
::-webkit-scrollbar {
    height: 12px;
    width: 12px;
    background: yellow;
::-webkit-scrollbar-thumb {
    background: red;
    -webkit-border-radius: 1ex;
    -webkit-box-shadow: 0px 1px 2px rgba(0, 0, 0, 0.75);
::-webkit-scrollbar-corner {
    background: #000;

In chrome://extensions with developer mode on: Load unpacked extension -> choose path/to/CustomCSS

And that's it. It works. Red scroll bar on yellow background.

Checking chrome://memory reveals it uses ~1.8MiB of memory.


Ed: If you want to override websites' styles you may try to use !important rule

background: red !important;
  • - thank you. after loading the extension, the scrollbar changes shape, from square corners to round, but I only see my custom color on few websites. Others seem to override the color. May 27, 2021 at 1:07
  • installing this as extension worked, but there is one small problem: This "extension" now appears as icon in the "extension pane" in the top right corner. I really don't want yet another useless icon there. Is there any way to hide it? May 31, 2021 at 1:43
  • My chrome is old and doesn't have such stuff, so I don't know what to tell you. In Firefox there is easy option to customize menu, maybe there is something like that in chrome.
    – tansy
    May 31, 2021 at 16:07
  • It's strange as the extension doesn't do anything with menu explicitly.
    – tansy
    May 31, 2021 at 16:58

Yes, it is possible.

!ddg chromium scrollbar color

How can I change the scroll bar in Google Chrome to have different colors?

How to change the scrollbar style and color in Chrome

Style the scrollbar with css in Google Chrome (-webkit)

And yet another one found following above links:

Google Chrome or Chromium

Google Chrome provides a user stylesheet that you can modify in the configuration folder or the user profile folder. In Chromium/Linux, it is located at ~/.config/chromium/Default/User StyleSheets/Custom.css. For Google Chrome it is at ~/.config/google-chrome/Default/User StyleSheets/. In MS Windows, the location is %AppData%\Local\Google\Chrome\User Data\Default\User StyleSheets. Depending on the browser version and OS this could vary but check the configuration folder on your system under the folder /Default/User StyleSheets/. Also If there is no file named Custom.css then you will need to create one inside the folder User StyleSheets/.

how to use a custom or user stylesheet (css) in a web browser.

  • I don't understand why I get negatives. This question has been answered on other sites but can not be flagged as duplicate because they're not unix.SE.
    – tansy
    May 24, 2021 at 9:44
  • none of these links answer my question May 25, 2021 at 2:06
  • Yes, they do. You need to read them. And formally, I have answered your question in one, simple sentence.
    – tansy
    May 25, 2021 at 16:38
  • I have created directory ~/.config/chromium/Default/User StyleSheets/ and inside created file Custom.css. Added .scrollable-element { scrollbar-color: red yellow; }, but no effect. Are you sure this should work? The answers provided all seem to require installing some kind of extension. May 26, 2021 at 1:50
  • 1
    Also, it may not work though as apparently chromium removed the concept of user stylesheets some time ago, which I didn't know till now. Although there was an effort to reintroduce it, it doesn't seem to work as expected. So you might need to use some kind of extension. I read about such uncompressed extension but lost a sight of site.
    – tansy
    May 26, 2021 at 14:02

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