Optional ReadonlyallOptional ReadonlyboldOptional ReadonlyboldOptional ReadonlyborderOptional ReadonlycharacterOptional ReadonlycolorThe text's color: a hex color such as "FF0000", "auto", or a color of the document's theme such as { theme: "accent1" }
Optional ReadonlydoubleOptional ReadonlyeffectOptional ReadonlyembossOptional ReadonlyemphasisOptional ReadonlyfontThe font: a font name, a font for each character set, or one of the fonts of the document's theme, such as
{ theme: "body" }
Optional ReadonlyhighlightOptional ReadonlyhighlightOptional ReadonlyimprintOptional ReadonlyitalicsOptional ReadonlyitalicsOptional ReadonlykernOptional ReadonlylanguageOptional ReadonlymathOptional ReadonlynoOptional ReadonlypositionOptional ReadonlyrevisionOptional ReadonlyrightOptional ReadonlyscaleOptional ReadonlyshadingOptional ReadonlysizeOptional ReadonlysizeOptional ReadonlysmallOptional ReadonlysnapOptional ReadonlyspecOptional ReadonlystrikeOptional ReadonlysubOptional ReadonlysuperOptional ReadonlyunderlineOptional Readonlyvanish
Run style properties options.
These properties define the formatting that can be applied to a run of text, including font, size, bold, italic, underline, color, and other character formatting.
Reference: http://officeopenxml.com/WPtextFormatting.php