# UI Customization (style.css) not taking effect?

**URL:** <https://community.dhis2.org/t/ui-customization-style-css-not-taking-effect/44730>\
**Category:** Support - Assistance technique\
**Created:** [22 October 2021 16:22 UTC](https://community.dhis2.org/t/ui-customization-style-css-not-taking-effect/44730 "2021-10-22T16:22:11Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Gassim](https://dhis2.b-cdn.net/user_avatar/community.dhis2.org/gassim/32/35347_2.png) [@Gassim](https://community.dhis2.org/u/Gassim)\
**Post date:** [22 October 2021 16:22 UTC](https://community.dhis2.org/t/ui-customization-style-css-not-taking-effect/44730/1 "2021-10-22T16:22:11Z")

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Hi all!  
I read in the DHIS2 Developer "Using the API " docs that it’s possible to customize the UI using CSS ([Settings and configuration - DHIS2 Documentation](https://docs.dhis2.org/en/develop/using-the-api/dhis-core-version-master/settings-and-configuration.html#webapi_customization_css)), so to test this out in play, I created my style.css file with my custom css:

 ![image](https://dhis2.b-cdn.net/uploads/default/original/3X/5/d/5d1f77fdaad81fd77ef263494acfdc2c32efd055.png)

And the POST request result is okay:

 ![image](https://dhis2.b-cdn.net/uploads/default/original/3X/a/e/aecc0979b8b6078ac4c56e7da96028e3407a3756.png)

However, even though I tested that the CSS works 100% when using the developer tools in the browser, it doesn’t seem to take affect. Any reason why? I tried using the incognito and clearing the browser cache but no difference. I also tried to search for the color that I used in the CSS in all files downloaded from the site but the styles.css isn’t downloaded ![image](https://dhis2.b-cdn.net/uploads/default/original/3X/4/3/4349292ff5c3e328c3cfbe36564af90b8b2f2a5c.png)

I’m aware that maybe there’s something that I missed, so thanks in advance!