58I want the app to look the way I like

If you would rather not scroll 40 themes, the colour theme screen offers Choose your look: four questions - light or dark, the mood you want, how much contrast you need, and then the theme. It ends on four presets: Minimal & Quiet, Cozy & Crafty (the recommended one), Clear & Readable, and Bold & Playful. Apply Style sets the theme, the surface style and the contrast together.

There are 40 themes, grouped into families - Minimal & Line, Vibrant & Rainbow, Soft & Cozy and more - so you can find the kind of thing you like before comparing individual ones. Each swatch shows its accent colours and whether it uses a border or a soft glow. A fresh install starts on Citrus Burst, marked Recommended.

Appearance decides the mode you are in now: Auto (follow the device), Light or Dark.

Beside it, Applies to decides which mode the theme you pick is saved for: Both, or only Light, or only Dark. That is how you run one theme by day and another at night - set Applies to Light and choose your daytime theme, then set it to Dark and choose the other. With Appearance on Auto, the app then changes with your device.

Surface is separate from colour: it decides how much the app fills in behind tiles, cards and buttons. Six options - Default, Minimal, Pure, Light, Regular, Bold. Minimal and Pure are the quiet ones (Minimal even puts the icons away); Regular and Bold paint the accent colour in properly. New installs start on Light.

Theme atmosphere is a beta: turn it on in Settings → Appearance → Beta Features and an Atmosphere control appears on the colour theme screen. Each of the 40 themes has its own authored scene, drawn quietly behind the app. Off, Still, or Drift - which lets it move very slowly.