function checkSetFormat(color, convertToStr) {
        if ((/^0x/).test(color)) {
            return _0xColorToHex(color, convertToStr);
        }
        if (convertToStr) {
            return tinycolor(color).toString();
        }
        return tinycolor(color);
    }
Ensures that a string is in Tinycolor supported format
@param {string} color - Color to check the format for
@param {boolean} convertToString - true if color should 
                                   be returned as string
@returns {tinycolor|string} - Color as a Tinycolor object
                              or a hex string