home-assistant.github.io/source/_components/frontend.markdown
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---
layout: page
title: "Frontend"
description: "Offers a frontend to Home Assistant."
date: 2015-12-06 21:35
sidebar: true
comments: false
sharing: true
footer: true
logo: home-assistant.png
ha_category: "Other"
---
This offers the official frontend to control Home Assistant.
```yaml
# Example configuration.yaml entry
frontend:
```
#### Themes
Starting with version 0.49 you can define themes:
Example:
```yaml
frontend:
themes:
happy:
primary-color: pink
sad:
primary-color: blue
```
The example above defined two themes named `happy` and `sad`. For each theme you can set values for CSS variables. For a partial list of variables used by the main frontend see [ha-style.html](https://github.com/home-assistant/home-assistant-polymer/blob/master/src/resources/ha-style.html)
There are 2 themes-related services:
- `frontend.reload_themes` - reloads theme configuration from yaml.
- `frontend.set_theme(name)` - sets backend-preferred theme name.
Example in automation:
```yaml
automation:
- alias: 'Set theme at startup'
initial_state: 'on'
trigger:
- platform: homeassistant
event: start
action:
service: frontend.set_theme
data:
name: pink
```