You’re used to pretty much everything looking a certain way. Sometimes change is good, other times you want things to look as they did before. Many sites and apps have started to offer a “Dark mode” colour scheme that uses a dark colour palette to make the screen appear less blindingly bright when viewed in darker environments. Dark modes can also offer battery life advantages for devices with an OLED or AMOLED display, as the pixels don’t need to produce as much light and so use less power.
Slack offers a dark mode that you can switch to at any time. You can also choose between a selection of pre-set colour schemes. If none of the colour schemes quite suit the look you want, you can even create your own custom theme.
To manage your Slack theme, you need to go into your preferences. To do so, click on your profile picture in the top-right corner, then click on “Preferences”.

Once in your preferences, switch to the “Themes” tab. At the top of the page, you can choose between the light and dark theme.

If you scroll down the page to the “Colors” section, you can find the pre-configured theme accents you can apply to both the light and dark themes.
Tip: There are a couple of hidden themes that can be found by clicking “Show all classic themes” directly under the first row of default themes.

If you want to create your own custom theme, click on “Create a custom theme” at the top of the “Colors” section and then configure each of the colour options.
Tip: You can open a colour picker by clicking on each of the coloured squares next to the HTML colour codes.

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