May 29, 2026
Five spools, infinite drama
Print with dozens of colors: Our new open-source ColorMix for PrusaSlicer
Prusa says five spools can make a rainbow, and fans are already turning it into a brand war
TLDR: Prusa unveiled an open-source way to print many color shades from just five filaments, making color 3D printing easier and cheaper to try. Fans are thrilled, but the comments quickly turned into a mix of brand-war chest-thumping and reminders that the community helped spark the whole idea.
Prusa just dropped ColorMix, a new open-source tool that lets certain 3D printers fake dozens of shades using only five filament colors, and the community reaction is basically: finally, the color chaos era is here. The company says it was inspired by hobbyists already experimenting with this trick in slicer forks and fan-made tools, then polished it into something easier to use. In plain English: instead of being stuck with only the colors physically loaded into your printer, you can blend the look of many more.
But the real fireworks are in the comments. One camp is pure hype mode — “This looks awesome!” was the polite version, while others immediately started acting like this was a shot fired in the never-ending printer rivalry. The spiciest take? A commenter cheering that this could “knock Bambu down a few notches,” turning a software update into full-on fandom warfare. Meanwhile, another group rushed in with the classic open-source reality check: hold on, the community was already doing this. They pointed to projects like OrcaSlicer Full Spectrum and reminded everyone that Prusa didn’t invent the idea from scratch — it packaged, credited, and expanded it.
And yes, the meme energy is alive too. “INDX anticipation intensifies!” reads like a trailer voice-over for a sequel nobody can stop refreshing for. So the mood is clear: part celebration, part credit dispute, part brand battle — and absolutely prime internet drama.
Key Points
- •Prusa introduced Prusa ColorMix, an open-source color-mixing model for multi-material 3D printing integrated into PrusaSlicer and EasyPrint.
- •The article credits community projects including OrcaSlicer-FullSpectrum, filament-mixer, and PeggyPalette as earlier work that demonstrated and supported the technique.
- •Prusa says it calibrated a new color-mixing model against measured FDM prints and linked it to material data through the OpenPrintTag Material Database.
- •The workflow is designed to produce many visible color tones from a limited filament set, with Prusa preparing a dedicated Prusament CMYKW material set.
- •The technical approach adapts principles from CMY/CMYK halftoning by alternating filament colors layer by layer so blended tones appear at normal viewing distance.