:root
{
--black: #000000;
--light-black: #0E141A;
--lime: #0A0F14;
--turquoise: #0F171F;
}
body
{
  background: var(--black);
  color:white;
}

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

header, .subcolor, .button
{
  background:var(--light-black);
  text-align:center;
}

.button
{border:double 6px #272B2F; padding:20px; margin:6px; background:white;}
main
{
  background: var(--light-black);
}

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