【CSS】CSSだけで背景色に合わせて文字の色を変化させるブレンドモードという方法【mix-blend-mode】

h1 {mix-blend-mode:normal;}
h2 {mix-blend-mode:difference;}
h3 {mix-blend-mode:overlay;}
h4 {mix-blend-mode:exclusion;}
h5 {mix-blend-mode:screen;}
img {mix-blend-mode:soft-light;}