Appearance

Streamliner follows your device's light or dark appearance. Its own theme is Base, black and white, until you pick another under Style. The app's theme dresses the sidebar or list, the pages and settings; each streamline wears a theme of its own: its chats, cards, buttons and your messages are drawn in it, so you can tell Register from Approvals at a glance.

Where the streamlines' themes come from

• In an organization, your organization chooses each streamline's theme: usually one brand theme with a different color per streamline, sometimes a whole different theme for one of them. They are the same on everyone's device; only its owners and admins can propose a change (AP-2).
• On this device (free), you choose each streamline's look: its icon and color, and its Theme: Follow the account, Own color (a color you pick), or a whole theme. See A streamline's theme (AP-2).
• Secure forms, secure views and questions a server asks you are never themed: their lock, title and footer always look the same, so you can always recognize one.

Style

Style (in the sidebar on the Mac and iPad, in the list on the iPhone; its row shows the theme the app is wearing) has two tabs.

Themes. Pick the app's theme under System Themes: Base, Quiet, Harbour, Refined Calm, Amber, Paperwhite or Nord. In an organization, its own themes are offered too. A one-sided theme is marked Light only or Dark only and keeps its look whatever your device's appearance.

• New Theme… under Make One opens the theme builder, starting from a copy of the theme you are wearing. Name it, choose Light and dark, Light only or Dark only, and set the colors you care about (ground, card, lines, text, quiet text, accent, and the three status colors); the rest is worked out from them, and text always keeps its contrast. The Preview follows every change. Save keeps it under My Themes; Cancel puts everything back.
• Your own themes can be edited and deleted, and every theme copied as JSON to send to someone. Import Theme takes such JSON and makes a new theme from it, never overwriting one of yours.

Text. Choose faces and a size for the whole app:

• Body, for everything except code: System, System Rounded, System Serif, Avenir Next, Helvetica Neue, Gill Sans or Georgia.
• Mono, for code, numbers and aligned chrome: System Mono, Menlo or Courier.
• Size, as a percentage.

A Preview shows the result as you choose. Faces and size are this device's own choice, never part of a theme. The iPhone also draws everything a third larger than the Mac (GS-7).

Each streamline's card wears the theme chosen for it, whichever app theme you pick, so the cards stay distinct. To change one, use its Theme card (AP-2).

What to watch for

Every theme keeps text readable on whatever it sits on: colors are adjusted, if needed, to keep a clear contrast, and more so when Increase Contrast is on in your device's accessibility settings. A theme can change how the app looks, never what it says.