One dark UI theme

A dark UI theme that adjusts to most Syntax themes.

The font used in the screenshots is Fira Mono. Icons by file-icons.

Combine with other Syntax themes

There is a matching Syntax theme, but most other Syntax themes work fine as well.

One dark + Sepia

One dark + Chester

Install

This theme is installed by default with Atom and can be activated by going to the Settings > Themes section and selecting "One Dark" from the UI Themes drop-down menu.

Settings

In the theme settings you can change the Font Size to scale the whole UI up or down.

Switch between 3 Layout Modes:

1. Auto (default) - In Auto mode, the UI and font size will automatically change based on the window size.
2. Compact - The UI stays compact to leave more space for the editor.
3. Spacious - The UI is expanded, giving some breathing room.

And pick a Tab Sizing mode:

1. Auto (default) - In Auto mode the tabs switch based on the window size.
2. Minimum - In Mimimum mode the tabs will be as small as possible.
3. Even - In Even mode all tabs will be the same size.

Customize

It's also possible to resize only certain areas by adding the following to your styles.less (Use the DevTools to find the right selectors):

.theme-one-dark-ui {
  .tab-bar { font-size: 18px; }
  .tree-view { font-size: 14px; }
  .status-bar { font-size: 12px; }
}

FAQ

Why do the colors change when I switch Syntax themes? This UI theme uses the same background color as the choosen Syntax theme. In case that Syntax theme has a light background color, it only uses its hue, but otherwise stays dark. This lets you use dark-light combos.