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Prusa Research

Configure your extruders, pick which ones to mix, choose ratios — and see every predicted shade you can print. Predictions from the prusa-fdm-mixer model; see the harness for accuracy. Filament data sourced from the OpenPrintTag database and HueForge affiliate libraries.

Extruders

Check the boxes for the extruders you want in the palette. Browse the OpenPrintTag and HueForge filament libraries to add real spools, or paste a custom hex.

Ratios

2-color ratios applied to every checked pair. 3-color triples always use 50:25:25 rotations.

Palette

About these predictions

The prusa-fdm-mixer model was fitted on 107 measured 2-color samples (Prusa XL, PLA). Median error ΔE 5.7; ~45% under the JND threshold of ΔE 5. 3-color predictions extend the model linearly with limited validation data — useful for ranking ideas, not for committing to a 20-hour print.