var colors = [ "#ededed", "rgb(172, 213, 242)", "rgb(127, 168, 201)", "rgb(82, 123, 160)", "rgb(37, 78, 119)" ];
var currentColor = colors[0];

window.onkeydown = (ev) => { window.currentColor = (colors[parseInt(ev.key) - 1]); console.log(window.currentColor); };

var calendar = $(".contrib-calendar").first();
var rawColls = calendar.children();
for(let rawColl of rawColls) {
    let coll = $(rawColl);
    let rawRows = coll.children();
    for(let rawRow of rawRows) {
        let row = $(rawRow);
        if(!row.hasClass("user-contrib-cell")) continue;

        row.on("click", function() {
            this.setAttribute("fill", currentColor);
        });

        rawRow.setAttribute("fill", currentColor);
    }
}