When you hover over the image, the colors appear. When you don't, the image is grey.

COPY AND PASTE code and replace all in CAPTIAL letters

<img src="PUT IMAGE URL HERE.gif" style="filter:progid:DXImageTransform.Microsoft.BasicImage(grayscale=1)" onmouseover="this.style.filter='progid:DXImageTransform.Microsoft.BasicImage(grayscale=0)'" onmouseout="this.style.filter='progid:DXImageTransform.Microsoft.BasicImage(grayscale=1)'">