<!DOCTYPE html>
<style>
img {
display: block;
position: fixed;
left: 0px;
top: 0px;
right: 0px;
bottom: 0px;
border: none;
width: 100px;
height: 100px;
margin: 0px;
padding: 0px;
image-rendering: -webkit-optimize-contrast;
}
</style>
<body>
<!-- The resulting image should be 100x100, consisting of 4 50x50 blocks of solid color, with no blurring of edges -->
<image style="" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAYAAABytg0kAAAAFElEQVQIHWP4z8DwHwyBNJDN8B8AQNEG+t5Ik2kAAAAASUVORK5CYII="></img>
</body>