Found as problematic in early 2013, reported as bugs to all browser vendors then, but still problematic.

Set up: You want an icon image - here it is a 'marker' - with some generated Text on it.
To have the Icon/image printed, it is NOT a background image, as that would not be printed by default.
The image is in the source as an image, absolutely positioned behind the text. Problem: If you have a set up like below, a small image with some text on it, Browsers change the Link color when printing.

For Screen all colors should be white, in print they should be: white, red, white.
The outcome:

2 2 2

The html:

	<a href="#">
		<img src="printbug/marker-black.png">
		2
	</a>
	
The CSS:
	a {
		position: relative;
		display: block;
		width: 27px; height: 38px;
		text-align: center;
		padding-top: 5px;
		color: #fff;
		text-decoration: none;
		}
	a img {
		position: absolute;
		top: 0;
		left: 0;
		z-index: -1
		}
	
In the external print stylesheet: In the second example the color is set to red
In the third example
-webkit-print-color-adjust: exact;
print-color-adjust: exact;
is added