Thank you for your interest in RadWordsProcessing.
The item in the release notes you are referring to is related to the special "automatic" value of themable colors. This value is represented by the IsAutomatic property of the ThemableColor class. If the value of the property is true - it means that the consumer application can automatically determine the color, based on the display context. For example, in MS Word, a border with color "auto" will be rendered black if the page background is white.
The support for automatic themable colors are more of an improvement on the existing Document Themes
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