You can use the images in your html page
<img src="http://dummydisplay.com/image/300/200">
Specify the width first, then height. Height is optional if no height is specified, your placeholder image will be a square. So this example…
http://dummydisplay.com/image/300
http://dummydisplay.com/image/300/200
colors code must be hex decimal color code. first is text color and second is background color
http://dummydisplay.com/image/300/200/FFFFFF
http://dummydisplay.com/image/300/200/FFFFFF/FF0000
You can specify text for your image by using a query string at the very end of the URL.
http://dummydisplay.com/image/300?text=Test+Image
http://dummydisplay.com/image/300/200?text=Test+Image
http://dummydisplay.com/image/300/200/FFFFFF?text=Test+Image
http://dummydisplay.com/image/300/200/FFFFFF/FF0000?text=Test+Image