The Gradients tool is a CSS gradient resampler.

Conventional CSS gradients plot a straight line through colour space, interpolating directly from the start to the end colour. This tool applies the principles of bézier curves, the basis of digital fonts, to this operation.

By introducing ‘control points’ along the gradient, you can more finely control the interpolation and produce a smoother end result. The tool then samples this ‘bézier gradient’ to produce a linear gradient you can work with in CSS.