3dshadow.mixin.scss

@mixin threedshadow($color, $depth) {
  $all: ();
  @for $i from 1 through $depth {
    $all: append($all, append($i*0px $i*1px 0, darken($color, $i+14%)), comma);
  }
  $all: append($all, 3px $depth*1px+5px 15px rgba(0,0,0,.1), comma);
  $all: append($all, 3px $depth*1px+5px 5px rgba(0,0,0,.3));
  text-shadow: $all;
}

use.scss

div{
  $color:desaturate(darken(tomato, 20%), 20%);
  color:$color;
  text-align:center;
  font-size:3em;
  text-transform:uppercase;
  font-weight:bold;
  margin:0 auto;
@include threedshadow($color,10);
  font-family:Verdana;
}