scss 将图像从黑白变为彩色，仅限CSS，仅使用一个彩色图像

Posted 2021-05-18

img.grayscale {
  filter: url("data:image/svg+xml;utf8,<svg xmlns=\'http://www.w3.org/2000/svg\'><filter id=\'grayscale\'><feColorMatrix type=\'matrix\' values=\'0.3333 0.3333 0.3333 0 0 0.3333 0.3333 0.3333 0 0 0.3333 0.3333 0.3333 0 0 0 0 0 1 0\'/></filter></svg>#grayscale"); /* Firefox 3.5+ */
  filter: gray; /* IE6-9, personally, I am not caring about IE-9 anymore */
  -webkit-filter: grayscale(100%); /* Chrome 19+ & Safari 6+ */
}

img.grayscale:hover {
  filter: none; /* simple */
  -webkit-filter: grayscale(0%);
}

// source: http://stackoverflow.com/questions/7273927/image-greyscale-with-css-re-color-on-mouse-over