Diff of LCH

• The added line is THIS COLOR.
• The deleted line is THIS COLOR.
• Go to LCH.

- [[Colorspace]]

- Lab色空間で描画されたCIE L*C*h(a*b*) 
--   https://www.wolfram.com/mathematica/new-in-10/enhanced-color-support-and-processing/cie-lchab-rendered-in-lab-space.html
https://www.wolfram.com/mathematica/new-in-10/enhanced-color-support-and-processing/HTMLImages.ja/cie-lchab-rendered-in-lab-space/O_28.png