particlesJS('particles-js', {
    "particles": {
        "number": {
            "value": 500
        },
        "color": {
            "value": "#ccc"
        },
        "size": {
            "value": 5,
            "random": true
        },
        "line_linked": {
            "enable": true,
            "distance": 150,
            "color": "#ddd"
        },
        "move": {
            "speed": 2
        }
    }
});

@@ -144,11 +144,11 @@
 : %22#
-ccc
+ddd
 %22%0A  

Make particles' color lighter