:root
{
--black: #000000;
--warm-white: #FFFAF2;
--cool-white: #EDFAFF;
--turquoise: #00837C;
}
body
{
  background: var(--cool-white);
  color:black;
}

header, main, div
{
  border:double 6px black; padding:20px; margin:6px;
}

header, .subcolor, .button
{
  background:white;
  text-align:center;
}
main
{
  background: white;
}

#green
{
  color: var(--green);
}
#lime
{
  color: var(--lime);
}