Add grey colors as variables

styles/_variables.scss

+$light-grey-bg-color: #f1f1f1;
+
+$light-grey-text-color: darkgrey;
+$middle-grey-text-color: #7c7c7c;
+$dark-grey-text-color: #565656;
+
 $amendement-bg-color: rgb(222, 213, 0);
 $amendement-text-color: #746F08;
 $plf-color: rgb(255, 107, 107);