Change opacity percentage to factor

frontend/keezen-frontend/src/css/lobby.css

@@ -3,7 +3,7 @@
     height: 50px;
     border-radius: 50%;
     border: #1d2124 2px solid;
-    opacity: 50%;
+    opacity: 0.5;
     font-family: "Font Awesome 5 Free";
     font-weight: 900;
     font-size: 19pt;
@@ -12,7 +12,7 @@
 }
 
 .color-pick.mine {
-    opacity: 100%;
+    opacity: 1;
 }
 
 .color-pick.mine:before,
@@ -21,7 +21,7 @@
 }
 
 .color-pick.selectable:hover {
-    opacity: 100%;
+    opacity: 1;
 }
 
 .color-pick.selectable:hover:before {