Dial down if results look oversaturated in practice; up if undersaturated
Mix darker so it dries to the target color
How much lighter your plaster dries (typical 30–60% for Venetian / Roman Clay)
Result
Dry target
—
→ Mix to this (wet)
—
Darker by drying-lift %
Predicted wet mix
—
ΔE: —
Target
—
Predicted mix
—
ΔE: —
Mix this — wet-compensated formula
Pigment
Ratio
Grams
Drops (approx)
Reference — dry-target formula (no compensation)
Pigment
Ratio
Grams
Drops (approx)
Pigment
Ratio
Grams
Drops (approx)
Pick a color and click Calculate
Pigment Calibration
If a pigment tints differently than expected in your plaster, adjust its hex here. Changes save to browser memory.
All
Regular
Fluorescent
Important Notes
This tool gives a starting-point estimate, not a guaranteed match. Every real-world formula needs a test sample on the actual substrate before you commit to a full batch. A few things the math cannot predict:
• Plaster dries 10–30% darker and shifts tone vs. wet — the preview shows predicted dry color, but your pigment load may need adjustment.
• Tinting strength of each Marblers pigment in your specific plaster medium (Venetian, Microcement, Roman Clay, etc.) varies — heavy-chroma colors may need less pigment than the formula suggests; neutral/earth tones often need more.
• Metamerism: a formula that looks right under shop lighting may shift under the client's actual lighting. Always check in the room.
• The Marblers pigment hex values are calibrated estimates. Use the Pigment Calibration panel above to refine them after you've test-mixed each pigment with your base.
Workflow tip: mix the formula at ½ the suggested grams first, trowel a small test, let it cure fully, then add pigment to match if needed. Write down every adjustment.