Colour Palette Generator

In short Colour harmony rules are geometry on the colour wheel: complementary is the hue directly opposite, analogous is the neighbours either side, triadic is three evenly spaced, tetradic is two complementary pairs, and monochromatic is one hue at different lightnesses. Each rule produces colours that are demonstrably related, which is genuinely useful — but a set of related colours is not yet a palette, and this is where generated schemes usually fail. A working palette needs a hierarchy: one dominant colour that covers most of the surface, one accent used sparingly for the things you want clicked, and a set of neutrals doing most of the actual work. Five equally vivid colours from a triadic scheme have no hierarchy at all, and a page built from them looks like a sample sheet. The standard rough division is around 60% dominant, 30% secondary, 10% accent, and the accent is the one that must survive a contrast check because it will end up on buttons and links. Use the rules to find candidates, then deliberately demote most of them — desaturate, lighten, or reduce them to a border colour.