Convert Image Colour to Greyscale with CSS

http://thenewcode.com/532/Convert-Images-To-Black-And-White-With-CSS

<style>
.bw {
    -webkit-filter: grayscale(1) !important;
    -moz-filter: grayscale(1) !important;
    -ms-filter: grayscale(1) !important;
    filter: grayscale(1) !important;
}
</style>

<img src="http://pustakakoran.com/img/cover/radarbojonegoro20170122.zip.jpg" width="100px" class="bw">