colour
60-30-10 rule
A colour-proportion heuristic borrowed from interior design – 60% dominant colour, 30% secondary, 10% accent, spent only on what most needs attention.
The ratio itself is a rule of thumb, not a law – the durable idea underneath is one dominant colour, one accent, used sparingly and consistently. In current high-craft interfaces the dominant 60% is almost always a near-white or near-black, and the 10% accent does all the “look here” work: the primary button, the key status, the brand mark.
Linear is the reference example: near-black canvas, light grey text, and a single lavender-blue accent reserved for the brand mark, focus rings and primary actions. When an interface feels like it’s shouting, count its accents – the answer is usually “too many colours holding the microphone”.