The WX display you are asking about is an embed (an iframe / data is being provided by another web service, called metar-taf.com) You can customize it slightly but not much, check dashboard/index.blade.php and check the main developer's website for what it accepts as color codes.
For the rest, you can either go for stylesheet editing (check bootstrap docs for deep details about its buttons, messages, warning etc) or you can find each file where buttons are used and then play with them freely as you wish.
Good luck