export declare function convertBackgroundToFigmaFill(background: string, setOpacity: number | undefined): {
    readonly blendMode: "NORMAL";
    readonly type: "SOLID";
    readonly color: any;
    readonly boundVariables: {};
    readonly opacity: any;
    readonly visible: true;
    readonly gradientStops?: undefined;
    readonly gradientTransform?: undefined;
    readonly imageUrl?: undefined;
} | {
    readonly blendMode: "NORMAL";
    readonly type: "GRADIENT_LINEAR";
    readonly gradientStops: {
        color: {
            r: number;
            g: number;
            b: number;
            a: number;
        };
        position: number;
    }[];
    readonly gradientTransform: [number, number, number][];
    readonly opacity: number;
    readonly visible: true;
    readonly color?: undefined;
    readonly boundVariables?: undefined;
    readonly imageUrl?: undefined;
} | {
    readonly blendMode: "NORMAL";
    readonly type: "IMAGE";
    readonly imageUrl: string;
    readonly opacity: number;
    readonly visible: true;
    readonly color?: undefined;
    readonly boundVariables?: undefined;
    readonly gradientStops?: undefined;
    readonly gradientTransform?: undefined;
} | undefined;