See the Pen <a href="https://codepen.io/firegroove/pen/JjxeMJr/9f285af00bac4a507734f3ee0f68a042"> d3 Interpolations (RGB, HSL, Lab, HCL, Cubehelix)</a> by Firegroove (<a href="https://codepen.io/firegroove">@firegroove</a>) on <a href="https://codepen.io">CodePen</a>.
