how it works
The picker reads pixels from a local canvas.
When you choose an image, the browser draws a resized preview to canvas. Clicking the preview reads one pixel and converts it into HEX, RGB and HSL.
What the palette means
The dominant palette is sampled from the image at intervals, then grouped into close color buckets. It is meant for quick design direction, not forensic color measurement.
When results can vary
Compression, shadows, gradients, browser color management and screenshots can shift a color. For production brand work, compare the picked value against the original design file.