RGB color value is converted into hexadecimal

function transferRgbToStr(color) {
        if (typeof color !== 'string' && !(color instanceof String) || !~color.indexOf('rgb')) return console.error("请输入rgb形式的颜色值");
        color = color.replace(/\s+/g, '');
        var index = color.indexOf('(') + 1;
        // Note: String the slice method, the time slice method parameter is negative, that is, the reciprocal of 
        the time // the substring method parameter is negative, that is all 0 
        var  Colors = Color . Slice ( index , - . 1 ). Split ( ',' .) Slice ( 0 , . 3 );
         for ( var  I = 0 ; I < Colors . length ; I ++) {
             IF ( the parseInt ( Colors [ I ], 10 )> 255 ||the parseInt ( Colors [ I ], 10 ) < 0 )
                 return  Console . error ( " color values range between 0 and 255 for the input value! ")
             Colors [ I ] = the parseInt ( Colors [ I ], 10 ). toString ( 16 );
             IF ( Colors [ I .] length === . 1 ) {
                 Colors [ I ] = " 0" + colors[i]
            }
        }
        return colors.join("");
    }

transferRgbToStr incoming value is rgb (0,0,0)