Hi,

The question is pretty simple:

In terms of colors, decoration allows us to use 06 colors:

decoration-danger - shows the line in LIGHT RED
decoration-info - shows the line in LIGHT BLUE
decoration-muted - shows the line in LIGHT GRAY
decoration-primary - shows the line in LIGHT PURPLE
decoration-success - shows the line in LIGHT GREEN
decoration-warning - shows the line in LIGHT BROWN

But is it possible to create a new one? 

Like: decoration-alert - to show orange text