Images & files
Pull a useful color palette from an image.
Extract representative colors from a local image, copy the palette, and compare selected solid pairs against sourced WCAG 2.2 contrast thresholds. The image stays in your browser and the result avoids pretending that one sampled palette can certify an entire design.
- No image upload
- Representative sampled colors
- Exact solid-pair contrast math
Image & extraction settings
Choose an image to sample.
Browser-only processing. The selected image and extracted colors stay on this device. Plainview Tools does not upload or store the image.
Representative palette
Compare solid color pairs.
The tool verifies the source file, samples a bounded canvas, and checks selected solid pairs with the WCAG luminance formula.
Choose a static PNG, JPEG, WebP, BMP, GIF, or AVIF image to begin.
How it works
Bound the sample. Show the method.
| Stage | What the tool does | What the result means |
|---|---|---|
| Verify | Checks the file signature, static-image status, dimensions, and safety limits before decoding | The selected file matches one supported image format |
| Sample | Draws a proportional local sample capped at 65,536 pixels | Large images do not create unbounded analysis work |
| Extract | Groups nearby sampled sRGB values deterministically and orders representatives by sampled share | A practical summary—not every color in the source file |
| Compare | Uses WCAG relative luminance and the unrounded ratio for each pass decision | Whether the selected two solid colors meet the shown thresholds |
These are representative colors from a bounded pixel sample, not a complete inventory of every source color. Gradients, compression, downsampling, embedded color profiles, and browser decoding can change which colors become the strongest representatives.
Fully transparent pixels are ignored. Partly transparent pixels are composited over the visible analysis matte because their apparent color depends on what sits behind them. Change the matte to model the intended page background, then extract again.
WCAG text contrast depends on the pixels immediately behind the letters. A representative palette pair cannot account for every light, dark, or patterned area in an image. Test the final placement and states; do not treat this result as a WCAG audit or conformance certificate.
The tool accepts static PNG, JPEG/JFIF, WebP, BMP, GIF, and AVIF files up to 10 MiB, 4,096px per edge, and 8,388,608 pixels. Animated files and SVG are rejected. AVIF decoding still depends on browser support.
Primary sources
The contrast thresholds and pixel boundary.
Reviewed August 25, 2026. Contrast decisions follow WCAG 2.2 and W3C's relative-luminance method; local sampling uses the browser Canvas pixel API.