Editing book

I am having trouble with a book opening on an iPad and it was suggested that I repair the book in Calibre. The book had been transferred to the iPad with CC, and would crash when I tried to open it with the Nook app. The same book had crashed when I tried to open it within the Nook app originally, which is why I tried moving it over with CC.

I went into the editor and tried to repair. The first type of error is where a font does not have the right name. I tell Calibre to fix it and it stays the same.

The error is
page_style1:css

The font family name specified in the CSS @font-face rule: "Shift Light" does not match the font name inside the actual font file: "Shift Bold Italic". This can cause problems in some viewers. You should change the CSS font name to match the actual font name.

I told Change the font name Shift Light to Shift Bold Italic everywhere, but nothing changed.

The second error I am even more lost in:

stylesheet.css (line: 87 column: 3)

This CSS construct is not recognized. That means that it most likely will not work on reader devices. Consider replacing it with something else.

Line 87 says this:
-webkit-text-fill-color: rgb(255, 102, 0);

I'm guessing the column 3 refers to the last number, but I don't know what to replace it with.