# Custom CSS isn't applied to my Discourse

**URL:** https://meta.discourse.org/t/custom-css-isnt-applied-to-my-discourse/178241
**Category:** Support
**Created:** [February 3, 2021, 8:54am UTC](https://meta.discourse.org/t/custom-css-isnt-applied-to-my-discourse/178241 "2021-02-03T08:54:53Z")
**Posts on this page:** 1
**Showing post:** 7

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### Author: ![pmusaraj](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/pmusaraj/32/119489_2.png) [@pmusaraj](https://meta.discourse.org/u/pmusaraj)
#### Post date: [February 3, 2021, 11:57pm UTC](https://meta.discourse.org/t/custom-css-isnt-applied-to-my-discourse/178241/7 "2021-02-03T23:57:15Z")

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Yes, it is another regression. It’s a bit of a tricky fix… and for the vast majority of color variables, theme components should be using CSS custom properties. You can look at this guide [Update themes and plugins to support automatic dark mode](https://meta.discourse.org/t/updating-themes-and-plugins-to-support-automatic-dark-mode/161595), for an overview and some examples on how to add custom color variations in a special `color_definitions.scss` file in your theme component.

Let me know how it goes!

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_[View the full topic](https://meta.discourse.org/t/custom-css-isnt-applied-to-my-discourse/178241)._