https://blog.gongquiz.com/2023/04/24/cmyk-%eb%aa%a8%eb%8d%b8%ec%9d%84-%eb%aa%a8%eb%91%90-%ec%88%98%ec%9a%a9%ed%95%a0-%ec%88%98-%ec%9e%88%eb%8a%94-%ec%83%89%ec%98%81%ec%97%ad%ec%9d%84-%ea%b0%80%ec%a7%80%ea%b8%b0-%eb%95%8c%eb%ac%b8/