Generated by SassMeister.com.

SassMeister-input.scss

// ----
// Sass (v3.3.9)
// Compass (v1.0.0.alpha.20)
// ----

$baseColor: #FFCC00;

@for $i from 1 to 5 {
  #mainbody :nth-child(#{$i}) {
      border-color: adjust-color($baseColor, $green: ($i - 1) * 1);
  }
  $i: $i + 1;
}

SassMeister-output.css

#mainbody :nth-child(1) {
  border-color: #ffcc00;
}

#mainbody :nth-child(2) {
  border-color: #ffcd00;
}

#mainbody :nth-child(3) {
  border-color: #ffce00;
}

#mainbody :nth-child(4) {
  border-color: #ffcf00;
}