Home Assistant

ColorExtractor

The color extractor integration will extract the predominant color from a given image and apply that color to a target light. Useful as part of an automation.

Configuration

To add the ColorExtractor integration to your Home Assistant instance, use this My button:

Services

Because color_extractor.turn_on will then call light.turn_on, you can pass any valid light.turn_on parameters (rgb_color will be set for you though) as those will be passed along.

Passing the key color_extract_url to the service call will download the linked image and extract the predominant color from it. Passing the key color_extract_path to the service call will process the image file from local storage instead. color_extract_url and color_extract_path are exclusive and cannot be used together.

Key Example Description
color_extract_url https://example.com/images/logo.png The full URL (including schema, http://, https://) of the image to process
color_extract_path /tmp/album.png The full path to the image file on local storage we’ll process
entity_id light.shelf_leds The RGB capable light we’ll set the color of

Please ensure any external URLs or external files are authorized for use. You will receive error messages if this integration is not allowed access to these external resources.

URL Service Call

Add the parameter key color_extract_url to the service call.

This service allows you to pass in the URL of an image, have it downloaded, get the predominant color from it, and then set a light’s RGB value to it.

File Service Call

Add the parameter key color_extract_path to the service call.

This service is very similar to the URL service above, except it processes a file from the local file storage.

Example Automations

Example usage in an automation, taking the album art present on a Chromecast and supplying it to light.shelf_leds whenever it changes:

#automation.yaml
- alias: "Chromecast to Shelf Lights"

  trigger:
    - platform: state
      entity_id: media_player.chromecast

  action:
    - service: color_extractor.turn_on
      data_template:
        color_extract_url: "{{ states.media_player.chromecast.attributes.entity_picture }}"
        entity_id: light.shelf_leds

With a nicer transition period of 5 seconds and setting brightness to 100% each time (part of the light.turn_on service parameters):

#automation.yaml
- alias: "Nicer Chromecast to Shelf Lights"

  trigger:
    - platform: state
      entity_id: media_player.chromecast

  action:
    - service: color_extractor.turn_on
      data_template:
        color_extract_url: "{{ states.media_player.chromecast.attributes.entity_picture }}"
        entity_id: light.shelf_leds
        brightness_pct: 100
        transition: 5