Discord has two themes built into their software, dark and light. Go to your user settings. Then, under "APP SETTINGS,"
click "Appearance." Here, you can select the theme you like, but if you want a more
advanced theme, like this one, you will need to use an
add-on called Better Discord. First, download Better
Discord from their website, Betterdiscord.app. The link is in the description below. Follow the installation prompts to install Better
Discord on your computer. Now you need to download a theme. On the Better Discord website, you can choose a theme
you like and download it. A link to the theme's page
is in the description below. To install your downloaded theme, inside Discord, go to
your user settings page. Scroll down until you see
the Better Discord settings, then click "Themes." Now click "Open Themes Folder." This will open the folder on your computer where Better Discord would like you to place your downloaded themes. Drop the downloaded theme you
chose in the previous step inside this new folder. Once the downloaded theme is placed inside the themes folder, its information will automatically appear inside the Better Discord themes page inside your Discord user settings. To activate the theme, click the toggle switch
next to the theme you want, and it becomes active.