1. Change text color to black using CSS.
2. Change background color from any colors to grey using CSS.
3. Turn all images to black & white using CSS.
img
{
-webkit-filter: grayscale(1); /* Older Webkit */
-webkit-filter: grayscale(100%);
-moz-filter: grayscale(100%);
-ms-filter: grayscale(100%);
-o-filter: grayscale(100%);
filter: grayscale(100%);
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 4+ */
filter: gray; /* IE 6-9 */
}
You can specify !important to overrides the style.
color:black!important;
Check this, it worked for me perfectly: https://chrome.google.com/webstore/detail/grayscale-black-white-col/cjimlckjgclgboeebpjlipmokolejppk?hl=en (Chrome only) Using this app I can convert any web page to black & white color scheme.