Light Meter (RGB & Luminance) extension enables you to measure the environment light in RGB format and luminance level via your computer camera.

This addon helps you easily measure some important light factors, such as red, green, and blue values and luminance level. When you open the app for the first time, it may ask you about camera access. Please accept the dialog box to start the add-on. Also, note that the app may take a few seconds before get ready. So please be patient while the add-on is getting ready. Once the loader is disappeared, the add-on is ready to use. It uses the camera in your system to capture the surrounding light. If your computer does not have a camera, please attach one to it before using the add-on. On the top toolbar in the popup UI, you see information about the surrounding light.

You can install this app as a PWA on your mobile device, moreover, it is available as a browser extension as well as a web application:

Chrome: https://chrome.google.com/webstore/detail/odomkcleacljnblhmigmlkjlplobpipn
Edge: https://microsoftedge.microsoft.com/addons/detail/bbkgepjchkbjodlikmajhgbciglldjbf
Opera: https://addons.opera.com/en/extensions/details/light-meter-rgb-luminance
Webapp & PWA: https://webbrowsertools.com/light-meter/

Support & FAQ: https://mybrowseraddon.com/light-meter.html