Background color of borders

Question

In html/css, can you insert a border beneath another border? Or give a background color to a border that is neither the background color of the text nor the color of the border?
For example, a dashed border that is yellow but has green background even though the text background is blue.

Answer 1

Using a box-shadow, you can do what you need by using the colour of the shadow as the background of your container (if that makes sense)
https://code.sololearn.com/W90BCt58Qkz6/?ref=app

Answer 2

Thanks