Pick a color
Drag on the wheel, use the arrow keys while it’s focused, or move the sliders — they all do the same thing.
A hex code, a Bullseye style number, or a glass name. Starting from a glass you own is the useful one — it answers “what goes with this?”
Take it with you
Both give you the glass names and style numbers to take to the shop. “Save as PDF” is a destination in your browser’s print dialog.
Start from a photo
A photo of anything — a painting, a tide pool, your own work — and the tool pulls out the colors it is actually made of, then matches each one to the nearest real Bullseye sheet. The photo stays on your computer; it is never uploaded anywhere.
Saved palettes
Kept in this browser only — nothing is uploaded, and they won’t follow you to another device.
Nothing saved yet. Hit Save palette to keep the current set.
Harmony
Glass lines
174 of 174 sheets in play
Closest real glass
Left half of each pair is the color you picked. Right half is the nearest Bullseye sheet.
Read this before you buy
The wheel matches the color of an unfired sheet as Bullseye publishes it. Glass changes in the kiln — opalescents open up, some reds and pinks strike, and thickness shifts a transparent noticeably. Treat a match as a shortlist to go and look at, not a decision.
Every result links to Bullseye’s own page for that style number so you can check it against the source.
How the matching works
The wheel is Newton’s. In Opticks (1704) he bent the spectrum into a circle and joined red back round to violet, which is the only reason “opposite = complementary” is a thing at all. Hue runs around the circle here, saturation runs out from the middle, and every harmony scheme is just angles on it — complementary is the color across, triadic is three at 120°.
Finding the closest real sheet is not Newton, and couldn’t be. Your color and all 174 sheets are converted into CIELAB — a color space built from measurements of actual human vision — and compared there, because equal distance in CIELAB means roughly equal difference to the eye. That is not true of RGB, where two colors can be numerically close and look nothing alike. It uses the 1976 formula; later ones judge very saturated colors a little better.