CIELChab 1) is a colorspace based on the following coordinates:
CIELChab is also known as:
This space is based on CIELAB where C and H are used instead of the Cartesian coordinates a* and b*.
ColorPicker to explore this color space. 2)
d3 has an hcl and lch constructor.
const color1 = d3.hcl("#075ebb") // hexadecimal RGB
console.log(`hue: ${color1.h} degree`);
console.log(`c: ${color1.c} `);
console.log(`lightness: ${color1.l} `);