Prusa ColorMix Prints 45 Shades From Five Filament Spools

Prusa has released a filament system that mixes colors at the print head using just five spools. The system, called Prusament PLA ColorMix, borrows the halftone dot-pattern technique from inkjet printing to produce 45 distinct shades from cyan, magenta, yellow, and white, plus two glitter spools for metallic accents.

The trick is layer-level color blending. By varying the ratio of transparent base colors at each layer, the human eye mixes them into new hues from a normal viewing distance. Black is harder to achieve because mixing CMY produces a blue-grey rather than true black. Prusa solves this by adding a dedicated black filament when you run five or more spools, giving you the full CMYWK palette on printers like the Prusa XL+ with five toolheads or any MMU3-equipped machine.

The starter bundle includes four translucent PLA base colors and one white spool. Two glitter variants round out the set. Prusa designed the system to work with any multi-material printer, not just its own. CORE-series printers with the Bondtech INDX upgrade can load three extra colors, expanding the gamut further.

Software support is already in place. PrusaSlicer includes the ColorMix model, and EasyPrint on Printables.com supports it as well. You select a target color in the slicer and it calculates the filament ratios automatically. There is no manual dithering or guessing involved.

At launch, the system targets users who already run multi-material printers. Filament pricing sits near standard Prusament PLA levels, so the main investment is time spent testing and calibrating. If you want colorful prints without buying a full rainbow catalog, this is a practical middle ground.