Dropper Bot
Dropper Bot
Spectral paint recipe solver
About

Sample from a photo

Upload up to three reference photos (max 2 MB each, held only in your browser), zoom in, and sample colours straight off the image. Each colour you add builds a custom recipe set in the tray on the right, solved against your chosen palette. No photo handy? Pick the built-in Colour gradient slot and sample straight off it.

Upload a photo and pick a slot to start sampling.
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Click the photo to sample a small averaged spot. The eyedropper button (Chrome / Edge only) grabs a single exact pixel from anywhere on screen.

What is ΔE00?

ΔE2000 measures how different two colours look to the human eye — the lower the number, the closer the match. It's measured in CIELAB, a colour scale built so equal steps look like roughly equal differences, under D65: the agreed standard for “average midday daylight,” so colours are always compared in the same neutral lighting. Zero means identical; about 1 is the smallest difference a trained eye can notice.

< 1.5 close match  ·  < 3.5 good  ·  < 7 approximate  ·  ≥ 7 best reachable

Scores above ~2.5 indicate the target sits at or beyond what this palette can physically mix. The hex values on screen are often more saturated than the actual paint.

ΔE at a glance