Question : add to img tag

img border color, border width

in
<img src="image.jpg"                          >

Answer : add to img tag

You should define all the elements of the border to make sure you get what you want (@TheQuietShadow - that didn't work for me... it's missing the border-style) eg

<img src='image.jpg' alt='' style='border:20px solid red;'/>

or adding to @TheQuietShadow's version

<img src='image.jpg' alt='' style='border-width:20px;border-style:solid; border-color:red;'/>