body {
  background-color: hsl(43, 40%, 25%);
}

a:link {
 color: hsl(300, 10%, 45%);
}

a:visited {
  color: hsl(300, 10%, 30%);
}

header {
  background-color: hsl(300, 30%, 87%);
  border-color: hsl(43, 40%, 25%);
}

.tehtavalista > li:nth-child(odd) {
  background-color: hsl(300, 10%, 95%);
}

.tehtavasarja > p {
  border-color: hsl(300, 10%, 65%);
}