h1, h2 
{
     font-family: "Trebuchet MS", Arial, Helvetica, sans-serif;  color: olive 
}
body 
{
     font-family: "Trebuchet MS", Arial, Helvetica, sans-serif ; color: blue
}
p 
{ 
    color: blue 
}
#tr1 
{
    color: black; background-color: white
}
#tr2
{
    color: white; background-color: gray
}
#tr3
{
    color: black; background-color: white
} 
#tr4
{
    color: white; background-color: gray
}