Match a tooth to shade-guide tabs with clinical ΔE color science.
Tooth and tabs under the same light, same distance from camera.
1.0×
Tap to drop a circle, or drag to size it. Zoom for precision: pinch, Ctrl/⌘+scroll, or the + / − buttons — to pan, tap the pan button, two-finger scroll, or hold Space and drag.Tap to drop a circle · pinch to zoom
Tooth
green circle — drag to move, corner to resize
Value L* –Chroma C* –Hue h° –Spread –
Mixed colors in this circle — move or shrink it so it covers only the tooth (no gum, no edge)
Shade map — per third, like a dentist's prescription
Incisal edge is translucent — its tab match is approximate.
Tips for a reliable reading
• Sample the middle third of the tooth/tab — avoid edges, glare and shadow.
• Spread = color uniformity inside a box; a warning means the box covers mixed surfaces — move or shrink it.
• ΔE00 ≤ 0.8 imperceptible · ≤ 1.8 clinically acceptable (Paravina 2015). Similarity% = 100 − 4·ΔE00.