[Solved]-How to change the background color of measure tool in stock chart in highstock?-Highcharts

You can change the background color by the options:

navigation: {
    bindings: {
        measure: {
            annotationsOptions: {
                typeOptions: {
                    background: {
                        fill: 'rgba(50, 150, 50, 0.5)'
                    }
                }
            }
        }
    }
}

Live demo: https://jsfiddle.net/BlackLabel/o1g78rfd/