button {
      font-size: 90%;
	  padding: 0.3rem
}

.gelb {
	color:royalblue;
	background-color: yellow;
}

.neu {
	color:white;
	background-color: red;
	
}

.blau {
	color: white;
	background-color: royalblue;	
}
.rot {
	color: white;
	background-color: red;	
}	
.btn {
	color: royalblue;
	background-color: white;	
}
button:hover {
	color: white;
	background-color: royalblue;	
}