Measured sample

Find the closest dye

Enter values measured with the same settings used for the catalogue.

Catalogue data

Using the measurements built into the app.

Import updated Excel

The file is read only in your browser and is never uploaded.

Results

Best matches

Target Match

Best match

—

Enter a measurement to begin.

ΔE00 — —

Estimated position—

Predicted Lab*—

Offsets—

Position in the a–b plane

The white point is the sample; the highlighted segment is the best match.

→ light to dark sample ΔE point

Chart view

Top 5 matches

Comparison against the closest point between light and dark.

3D Lab* neighbourhood

Drag to rotate and use the wheel to zoom. Every visible segment is labelled; circles 1–5 mark the exact points with the lowest ΔE00 for the Top 5 matches.

→ light to dark sample minimum ΔE00 point (1–5)

Experimental estimate

Suggested dye blends

Numerical proposals using two or three dyes, calculated from the measured Lab* references.

Lab* model

2 dyes

Estimated ΔE00—

Target Estimated blend

Predicted Lab* — Total estimated dose — —

3 dyes

Estimated ΔE00—

Target Estimated blend

Predicted Lab* — Total estimated dose — —

Use as a starting formulation only. Each dose is interpolated from the light and dark concentrations stored in the Excel catalogue, then scaled by its contribution to the blend. For time-controlled references, the app uses the mean listed concentration. Lab* values do not fully describe the physical interaction between dyes, so confirm every proposal with a laboratory trial.

How the match is calculated

For each dye, the app finds the closest point along the Lab* segment measured from the light sample to the dark sample, then calculates the CIEDE2000 distance. Results are indicative: illuminant, observer, instrument geometry, finish and process must match the catalogue measurement conditions.

The “very close”, “close” and “verify” ratings are initial working thresholds. They should be refined after comparison with visual and production acceptance.

Blend suggestions first place each dye at the point on its light-to-dark segment closest to the target L*. The concentration at that point is linearly interpolated from the two g/L values in the Excel catalogue. The app then tests blend ratios in 5% steps, converts each contribution to g/L, sums the total dose, interpolates L*, a* and b*, and ranks every candidate with CIEDE2000.