---
title: "Set app theme"
method: PUT
path: "/api/v1/device/app/theme"
tags: ["device"]
---

# Set app theme

`PUT /api/v1/device/app/theme`

Sets the in-app theme override. Use `light` or `dark` to force the application theme, or `system` to clear the override and follow the host/device setting.

## Request body

- ThemeSetRequest — unresolved $ref

## Response `200`

Updated application theme information.

- ThemeInfo — unresolved $ref

## Other responses

- `400` — Invalid request argument.
- `500` — Internal server error.
- `501` — Capability not implemented by the connected backend.

## Changes

> 16 revisions in range; 14 could not be searched.

- **2026-04-14** `182d5c8c4462` — 1 breaking
  - api path removed without deprecation

[Change history](https://skmtc.dev/dotnet/apis/devflow-agent-protocol/changes/api/v1/device/app/theme/put.md)

---

[API](https://skmtc.dev/dotnet/apis/devflow-agent-protocol.md) · [All operations](https://skmtc.dev/dotnet/apis/devflow-agent-protocol/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/dotnet/devflow-agent-protocol/revisions/31dec8eed3de/schema)