Diff of Brightness

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

TITLE:Brightness(明るさ)

- [[Luminance]] (輝度、照度)
- [[Lightness]] (明度)

- 輝度・照度・明度・明るさ の違いを説明できます
-- https://note.com/yoshicolor/n/n321b7f13952a