Before operating this tool, you need to load an image. You can either load from an external URL or from a file on your computer. Please give it a few seconds for the image to load.
After the image is loaded, click anywhere on the image to highlight the color at the point clicked. It it's a light color, all other colors in the image will become dark. If it's a dark color, all other colors in the image will become light.
At the "Info" tab, you may zoom on the image. The image is automatically zoomed if you resize this window.
You may also adjust the matching threshold, in case the uploaded image needs more JPEG and the colors aren't quite exact.
You may open or close this panel by clicking on its title.