Build a harmony — complementary, analogous, triadic, tetradic, split complementary or monochromatic — and a full 50 to 950 scale from one colour, ready to paste into a stylesheet.
All of it is computed in OKLCH and gamut-mapped by reducing chroma rather than clipping channels, so a rotated hue stays the hue you asked for. Export as CSS variables, a Tailwind config block, JSON or plain hex.