# How to enable dark mode in Casper 3.0?

**URL:** <https://forum.ghost.org/t/how-to-enable-dark-mode-in-casper-3-0/9822>\
**Category:** Themes\
**Created:** [October 28, 2019, 1:17pm UTC](https://forum.ghost.org/t/how-to-enable-dark-mode-in-casper-3-0/9822 "2019-10-28T13:17:03Z")\
**Posts on this page:** 1\
**Showing post:** 9

<div class="post-metadata">

**Author:** ![giacomosilli](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.ghost.org/giacomosilli/32/3403_2.png) [@giacomosilli](https://forum.ghost.org/u/giacomosilli)\
**Post date:** [October 30, 2019, 10:03am UTC](https://forum.ghost.org/t/how-to-enable-dark-mode-in-casper-3-0/9822/9 "2019-10-30T10:03:46Z")

</div>

When I have to modify the CSS I work directly in this path

```
/assets/built/screen.css

```

and not in this

```
/assets/css/screen.css

```

and I’ve never had any problems

About the color switch, I tested on the mac works correctly, how to do the same thing from windows and from ubuntu? it’s possible?

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