See the Pen <a href="https://codepen.io/firegroove/pen/wvNNYOM/7f3175ec5fb1563bc5c2eabfe13b65fc"> Munsell Color System 3</a> by Firegroove (<a href="https://codepen.io/firegroove">@firegroove</a>) on <a href="https://codepen.io">CodePen</a>.
