import * as Ast from "@unified-latex/unified-latex-types";
/**
 * Compute the hex representation of a color specified by an xcolor color command.
 * For example `\color[rgb]{1 .5 .5}` or `\textcolor{red}{foo}`. If the color cannot be parsed,
 * `null` is returned for the hex value. In all cases a css variable name (prefixed with "--"")
 * is returned. This can be used to set up CSS for custom colors.
 */
export declare function xcolorMacroToHex(node: Ast.Macro): {
    hex: string | null;
    cssVarName: string;
};
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