Hueka

See how colours really mix.

Most colour-mixing apps average RGB values. That tells you blue and yellow make grey. Real paint makes green.

Hueka mixes the way paint actually mixes: every pigment is a reflectance curve sampled across the visible spectrum, blended with Kubelka–Munk subtractive theory and converted to screen colour through the CIE 1931 observer. Every mix comes with an explanation of why it turned out that way.

Three modes

• Simple — six colours, tap to mix, get the result and its name straight away.
• Studio — eight named pigments, mixing by parts, and a full breakdown of what each pigment did.
• Challenge — match a target colour, scored on the CIE76 colour distance.

Support

Common questions

Why is my green duller than the one in the tube?
Because that is what happens with real paint. Mixing is subtractive: it can only ever remove light, never add it. Ultramarine absorbs part of the green band, so a blue-plus-yellow green will always be muted. Studio mode will suggest a cleaner pigment when it detects this.

Why does everything turn brown when I add a third colour?
Each pigment absorbs its own slice of the spectrum. Three of them together absorb almost everything, so the result drifts toward a dark neutral. Not a bug — it is the classic muddy puddle in the middle of a palette.

Do the colours match real paint exactly?
No. The pigment curves are plausible stand-ins for real paint, not spectrometer measurements. Hueka is a good teacher, not a colour-matching tool.

Does the app work offline?
Yes. Every mix is computed on your device.

Privacy

The app does not ask you to create an account, and the colours you mix are never sent anywhere. Ads are provided by Google AdMob; the full details are in the privacy policy.