<img class="img1" width=300 src="https://cdn.jsdelivr.net/gh/pengfeiw/PengfeiBlog@1.0.0/image/1.jpg" />

<img class="img2" width=300 src="https://cdn.jsdelivr.net/gh/pengfeiw/PengfeiBlog@1.0.0/image/1.jpg" />
.img1 {
  filter: sepia(1);
}

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