getColor = function(d){
let color = 'black'
if(d.source == 'daily-mail'){
color = d3.rgb(11,77,180)
}
else if(d.source == 'the-telegraph'){
color = d3.rgb(44, 255, 254)
}
else if(d.source == 'bbc-news'){
color = d3.rgb(150, 14, 20)
}
else if(d.source == 'the-guardian-uk'){
color = d3.rgb(51, 150, 51)
}
return color
}