I came across this blog post recently. It opened my eyes to the Lab color space, and how you can use it to create perceptually uniform gradients and color scales with SASS. Chroma.js is the underlying library powering it. Check it out if you want a deeper understanding of the Lab color space and why it's good for creating color scales. Basically, it's a color space that, unlike RGB, was built to mirror the visual response of the human eye. That makes it very well suited for interpolating colors. This command will take the gradient of the selected shape and add new color stops to create a more aesthetically pleasing one.