Stroke around image box?

[jennypenny]

How do I add a simple stroke around an image box? I have figured this is the below is the code, but where do I post it in Lay Theme to be able to access the option?

.border-blue {
border: #a0daf6 solid 2px;
}

[mariusjopen]

Hi Jennypenny!

All the Custom CSS code goes here:

Best!

Marius

[jennypenny]

Lovely, thank you!

[mariusjopen]

You are welcome!