body{background-color :rgba(0, 0, 0, 0.925);
font-family:Arial, Helvetica, sans-serif } 

h1{color:rgb(74, 102, 197);
text-align: center;
}
h2{color:white}
p{text-align: justify;
color:white}
h3{color:rgb(56, 57, 122)}
table{text-align: center;
    color:white
} 
a{ background-color: aqua;}
tr:nth-child(even) {
  background-color:blue;
}
tr:nth-child(odd) {
  background-color:darkblue;
}

div{background-color: darkblue;} pie de pagina y listo