project management feature (#15)

Reviewed-on: #15

frontend/src/style.css

@@ -2,6 +2,14 @@
   -webkit-user-select: none; /* Safari */
   -ms-user-select: none; /* IE 10 and IE 11 */
   user-select: none; /* Standard syntax */
+  --first-color: #1B262C;
+  --second-color: #0F4C75;
+  --third-color: #3282B8;
+  --fourth-color: #BBE1FA;
+  --ok-color: #2BA646;
+  --nok-color: #A6322B;
+  --white-color: #FFFFFF;
+  --orange-color: #BC9714;
 }
 
 html, body {