LyX ⇒ Adjusting vertical table line width and color

[jonas87]

Hi,

Im trying to modify the width and color of a vertical line in a table.
So far I have only found instructions to modify the color of horizontal lines:
http://tex.stackexchange.com/questions/ ... der-colour

and to modify vertical line width in LaTeX, which seems incompatible with LyX:
http://www.latex-community.org/forum/vi ... f=5&t=3149

How can I do this?
Alternatively, what I'm trying to achieve is this.
example
Is there a better way to approach this than with a table?

[jonas87]

tcolorbox is probably the easiest solution