Image Color Picker & Eyedropper
Extract exact pixel colors from photos with an interactive loupe magnifier. 100% private in-browser canvas processing without server uploads.
Technical Specification & Mathematical Principles
The Image Color Picker uses the HTML5 2D Canvas context method ctx.getImageData(x, y, 1, 1) to extract raw 8-bit unsigned integer channels [R, G, B, A] from the underlying pixel buffer.
Coordinate normalization maps the CSS viewport bounding box rect.width and rect.height back to intrinsic bitmap dimensions via scaling factors scaleX = canvas.width / rect.width, eliminating discrepancies caused by responsive responsive scaling.
Frequently Asked Questions
Related Design & Color Instruments
Interactive Color Picker
Explore colors with bidirectional state binding across HSL, RGB, and HEX channels with real-time numeric readouts.
Browser EyeDropper Tool
Sample any pixel color directly from your monitor or browser window using the native Chromium window.EyeDropper API.
Interactive Color Wheel
Explore color spectrums and geometric harmonies directly on an interactive 360-degree HTML5 canvas wheel.
Dominant Color Finder
Detect the single most prominent color in any image using 3D color histogram quantization off the main thread.