Mixes the base colour toward white (tints) and black (shades) in perceptual OKLab so steps look evenly spaced, or in plain sRGB to match legacy tools. Choose symmetric steps or a Tailwind-style 50–950 scale with the base at 500, then export CSS custom properties, a Tailwind colour object, a Markdown table or JSON; swatches appear in the preview. Everything runs locally.