Shade Matching Calculator

Evaluate dental shade match quality using spectrophotometer L*a*b* values and Delta E color difference.

Medical Disclaimer

This calculator is for informational and educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making decisions about your health. Never disregard professional medical advice or delay seeking it because of results from this tool.

Inputs

Sample L* (Lightness)

Sample a* (Red-Green)

Sample b* (Yellow-Blue)

Target L*

Target a*

Target b*

Tab to move between fields

Results

Delta E

1.5

Match Quality

Good (perceptible by trained eye)

Clinically AcceptableYes

Value AssessmentToo light

Chroma AssessmentToo desaturated

ΔL*1

Δa*-0.5

Δb*-1

Approx VITA ShadeA2/B2

How to Use This Calculator

Take a spectrophotometer reading of the restoration and enter the Sample L*, a*, and b* values.
Enter the Target L*, a*, and b* values from the natural tooth reading.
Review the calculated Delta E — values below 1.0 are imperceptible, below 3.3 are clinically acceptable.
Check Match Quality and the Clinically Acceptable flag to determine if the restoration passes.
Use the Value Assessment and Chroma Assessment guidance to adjust layering or staining as needed.

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