Xcode commit color meaning?

In the abominable new commit line diff view, I have no idea what the colors mean. Some text is highlighted in a cream color, other text in purple. Googling just turns up people hating the view, as I do. I haven't found anything in the Xcode docs that explains the coloring. Looking at my files, I think cream is a deleted line and purple is added lines. Is that right? Light mode.

Xcode commit color meaning?
 
 
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