[pargoo]

After deciding I'd use something different from the standard three asterixes for section breaks, I took the advice on the Sigil Tutorial and tried this:

<hr width="10%" color="#000000">

My first attempt gave me an immediate error, which I allowed Sigil to auto-correct into:

<hr color="#000000" width="10%" />

I now have nice solid black lines centered where I want them, but today a test-run of Flightcrew returned the following errors:

'attribute 'color' is not declared for element 'hr', and
'attribute 'width' is not declared for element 'hr'

Apparently I have to replace one or both of these attributes via CSS using 'color' and 'background-color' properties, but how exactly?
Thanks.