A simpified blueprint based on less, stripped of all the presumptious classes/colors/etc

blueprint-simple.less

/* --------------------------------------------------------------

   reset.css
   * Resets default browser CSS.

-------------------------------------------------------------- */

html, body, div, span, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
a, abbr, acronym, address, code,
del, dfn, em, img, q, dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td,
article, aside, dialog, figure, footer, header,
hgroup, nav, section {
  margin: 0;
  padding: 0;
  border: 0;
  font-weight: inherit;
  font-style: inherit;
  font-size: 100%;
  font-family: inherit;
  vertical-align: baseline;
}

article, aside, dialog, figure, footer, header,
hgroup, nav, section {
    display:block;
}

body {
  line-height: 1.5;
}
/* Tables still need 'cellspacing="0"' in the markup. */
table { border-collapse: separate; border-spacing: 0; }
caption, th, td { text-align: left; font-weight: normal; }
table, td, th { vertical-align: middle; }

/* Remove possible quote marks (") from <q>, <blockquote>. */
blockquote:before, blockquote:after, q:before, q:after { content: ""; }
blockquote, q { quotes: "" ""; }

/* Remove annoying border on linked images. */
a img { border: none; }


/* --------------------------------------------------------------

   typography.css
   * Sets up some sensible default typography.

--------------------------------------------------------------

// Setup defaults for links and fonts/colors*/

@font-color: #333;
@a-color: blue;
@a-hover-color: @a-color;
@quiet-color: @font-color + #444;
@loud-color: #000;
@default_fonts: "Helvetica Neue", Arial, Helvetica, sans-serif;

/* Default font settings.

   The font-size percentage is of 16px. (0.75 * 16px = 12px) */
html { font-size:100.01%; }
body {
  font-size: 75%;
  color: @font-color;
  background: #fff;
  font-family: @default_fonts;
}


/* Headings
-------------------------------------------------------------- */

h1,h2,h3,h4,h5,h6 { font-weight: normal; color: @font-color; }

h1 { font-size: 3em; line-height: 1; margin-bottom: 0.5em; }
h2 { font-size: 2em; margin-bottom: 0.75em; }
h3 { font-size: 1.5em; line-height: 1; margin-bottom: 1em; }
h4 { font-size: 1.2em; line-height: 1.25; margin-bottom: 1.25em; }
h5 { font-size: 1em; font-weight: bold; margin-bottom: 1.5em; }
h6 { font-size: 1em; font-weight: bold; }

h1 img, h2 img, h3 img,
h4 img, h5 img, h6 img {
  margin: 0;
}


/* Text elements
-------------------------------------------------------------- */

p           { margin: 0 0 1.5em; }


/*
	These can be used to pull an image at the start of a paragraph, so
	that the text flows around it (usage: <p><img class="left">Text</p>)


*/

.left        { float: left; margin: 1.5em 1.5em 1.5em 0; padding: 0; }
.right       { float: right; margin: 1.5em 0 1.5em 1.5em; }


a, a:focus{ color: @a-color; }
a:hover{ color:@a-hover-color; }

blockquote  { margin: 1.5em; color: @quiet-color; font-style: italic; }
strong,dfn  { font-weight: bold; }
em,dfn      { font-style: italic; }
dfn         { font-weight: bold; }
sup, sub    { line-height: 0; }

abbr,
acronym     { border-bottom: 1px dotted @quiet-color; }
address     { margin: 0 0 1.5em; font-style: italic; }
del         { color:@quiet-color; }

pre         { margin: 1.5em 0; white-space: pre; }
pre,code,tt { font: 1em 'andale mono', 'lucida console', monospace; line-height: 1.5; }


/* Lists
--------------------------------------------------------------
 */

ul          { list-style-type: disc; }
ol          { list-style-type: decimal; }

li ul,
li ol       { margin: 0; }
ul, ol      { margin: 0 1.5em 1.5em 0; padding-left: 3.333em; }

dl          { margin: 0 0 1.5em 0; }
dl dt       { font-weight: bold; }
dd          { margin-left: 1.5em;}


/* Tables
-------------------------------------------------------------- */

table       { margin-bottom: 1.4em; width:100%; }
th          { font-weight: bold; }
thead th    { background: #c3d9ff; }
th,td,caption { padding: 4px 10px 4px 5px; }
tfoot       { font-style: italic; }
caption     { background: #eee; }

/* --------------------------------------------------------------

   grid.css
   * Sets up an easy-to-use grid of x columns.

   By default, the grid is 950px wide, with 24 columns
   spanning 30px, and a 10px margin between columns.

   If you need fewer or more columns, namespaces or semantic
   element names, the following

-------------------------------------------------------------- */
@width: 950px;
@column: 30px;
@margin: 10px;
@box_background: #E5ECF9;

/* A container should group all your columns. */
.container {
  width: @width;
  margin: 0 auto;
}



/* Columns
-------------------------------------------------------------- */

/* Sets up basic grid floating and margin. */
.column () {
	float: left;
	margin-right: @margin;
}

/* Use this mixin to set the width of a column. you should avoid @levels wider then @width */
.span (@level: 1) {
	.column;
	width: (@level * @column) + ((@level - 1) * 10px);
}

/* The last column in a row needs this class. */
.last { margin-right: 0; }

/* Use these classes to set the width of an input. */
.input_span (@level: 1) {
  border-left-width: 1px;
  border-right-width: 1px;
  padding-left: 5px;
  padding-right: 5px;
  width: ((@level * @column) + ((@level - 1) * 10px) - 12px);
}

/* Add these to a column to append empty cols. */
.append (@level: 1) {
	padding-right: ((@column * @level) + (@level * 10px));
}

/* Add these to a column to prepend empty cols. */

.prepend (@level: 1) {
	padding-left: ((@column * @level) + (@level * 10px));
}

/* Border on right hand side of a column. */
.border () {
  padding-right: 4px;
  margin-right: 5px;
  border-right: 1px solid #eee;
}

/* Border with more whitespace, spans one column. */
.colborder () {
  padding-right: 24px;
  margin-right: 25px;
  border-right: 1px solid #eee;
}


/* Use these classes on an element to push it into the
next column, or to pull it into the previous column.  */

.pull (@level: 1) {
	margin-left: (@column * @level * -1) + (@level * -10px);
	float: left;
	position:relative;
}

.push (@level: 1) {
	margin: 0 ((@column * @level * -1) + (@level * -10px)) 1.5em ((@column * @level) + (@level * 10px));
	float: right;
        position:relative;
}

/* Misc classes and elements
-------------------------------------------------------------- */

/* In case you need to add a gutter above/below an element */
.prepend-top {
  margin-top:1.5em;
}
.append-bottom {
  margin-bottom:1.5em;
}

/* Use a .box to create a padded box inside a column.  */
.box {
  padding: 1.5em;
  margin-bottom: 1.5em;
  background: @box_background;
}

/* Use this to create a horizontal ruler across a column. */
hr {
  background: #ddd;
  color: #ddd;
  clear: both;
  float: none;
  width: 100%;
  height: .1em;
  margin: 0 0 1.45em;
  border: none;
}

hr.space {
  background: #fff;
  color: #fff;
  visibility: hidden;
}


/* Clearing floats without extra markup
   Based on How To Clear Floats Without Structural Markup by PiE
   [http://www.positioniseverything.net/easyclearing.html] */

/*
.clearfix:after, .container:after {
  content: "\0020";
  display: block;
  height: 0;
  clear: both;
  visibility: hidden;
  overflow:hidden;
}
*/
.clearfix, .container {display: block;}

/* Regular clearing
   apply to column that should drop below previous ones. */

.clear { clear:both; }