.white {
    background-color:white;
}
.red {
    background-color:red;
}
.green {
    background-color:green;
}
.purple {
    background-color:purple;
}
.rectangle {
    width:1600px;
    height:20px;
}
h1 {
    color:purple;
}
.nav {
    font-family:Comic sans ms;
}
main {
     font-family:comic sans ms;
}
footer {
    margin-top:5%;
    padding:2em;
}
img.contrast-filter:hover {
    filter: contrast(200%);
}
img.grayscale-filter:hover {
    filter: grayscale(100%);
}
img.blur-filter:hover {
    filter: blur(4px);
}
img.brightness-filter:hover {
    filter: brightness(200%);
}