Chart.js tooltip background color setting

I am trying to change the background color of the tooltip, but can only seem to change the key: https://jsfiddle.net/1ez0Lo8a/ Referring to the black background of the tooltip when you hover over the bar.

tooltips: {
                yAlign: 'bottom',
                callbacks: {
                    labelColor: function(tooltipItem, chart) {
                        return {
                            backgroundColor: 'rgb(255, 0, 0)'
                        }
                    },
                }

Further, as you can see, I've managed to remove the axis - but none of those settings have removed the very bottom horizontal axis. Can anyone advise how to remove that one also ?

Use backgroundColor property directly under tooltips .

Try this code :

tooltips: {
    yAlign: 'bottom',
    callbacks: {
        labelColor: function(tooltipItem, chart) {
            return {
                backgroundColor: 'rgb(255, 0, 0)'
            }
        },
    },
    backgroundColor: '#227799'
}