CMYK 转 RGB

• Red = 255 × ( 1 - Cyan / 100 ) × ( 1 - Black / 100 )
• Green = 255 × ( 1 - Magenta / 100 ) × ( 1 - Black / 100 )
• Blue = 255 × ( 1 - Yellow / 100 ) × ( 1 - Black / 100 )

参考: https://www.ginifab.com/feeds/pms/cmyk_to_rgb.php