Bar Graph

I'm doing a bar graph I have this code that paints the bars of the gray graph but what I want is that it is a color for each bar for example for the bar one = green the two = yellow and the three = red but I do not know how to put another color next to '# 000000' marks me error

var areaChartData = {
                    labels  : ['Exploracion uno', 'Exploracion dos ', 'Exploracion 3'],
                    datasets: [{
                        label               : 'Electronics',
                        Color               :'#000000' ,
                        data                : [uno, dos, tres]
                    }]
                  }