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              <div class="container">
  Original Image Version<br>
  <div class="box"><img src="http://rexmac.com/img/bs-docs-masthead-pattern.png" /></div>
</div>
<div class="container">
  CSS Version
  <div class="box bootstrap-docs-masthead-pattern"></div>
</div>
            
          
!
            
              .bootstrap-docs-masthead-pattern {
  background-image:
    /* Horizontal lines */
    linear-gradient(rgba(255,255,255,0.05) 1px, transparent 1px),
    /* Vertical lines */
    linear-gradient(90deg, rgba(255,255,255,0.05) 1px,transparent 1px),
    /* Diagonal lines - downward left ot right */
    repeating-linear-gradient(26.56505deg, rgba(255,255,255,0.07), rgba(255,255,255,0.07) 2px, transparent 2px, transparent 44.72136px),
    /* Diagonal lines - upward left to right */
    repeating-linear-gradient(153.43495deg, rgba(255,255,255,0.07), rgba(255,255,255,0.07) 2px, transparent 2px, transparent 44.72136px),
    /* All circles look better and more accurate in Mozilla Firefox, when using 149px and 150px as color stop points rather than 148px, and 149px. Unfortunately, it completely ruins the effect in Google Chrome :( */
    /* Central circle */
    radial-gradient(closest-side, transparent 0%,transparent 148px,rgba(255,255,255,0.07) 148px,rgba(255,255,255,0.07) 149px,transparent),
    /* Semi-circles - left and right */
    radial-gradient(closest-side, transparent 0%,transparent 148px,rgba(255,255,255,0.07) 148px,rgba(255,255,255,0.07) 149px,transparent),
    /* Semi-circles - top and bottom */
    radial-gradient(closest-side, transparent 0%,transparent 148px,rgba(255,255,255,0.07) 148px,rgba(255,255,255,0.07) 149px,transparent),
    /* Quadrant-circles(?) - four corners */
    radial-gradient(closest-side, transparent 0%,transparent 148px,rgba(255,255,255,0.07) 148px,rgba(255,255,255,0.07) 149px,transparent);
  background-size:
    100px 50px,  /* Horizontal lines */
    100px 50px,  /* Vertical lines */
    100px 50px,  /* Diagonal lines - downward left ot right */
    100px 50px,  /* Diagonal lines - upward left to right */
    300px 300px, /* Central circle */
    300px 300px, /* Semi-circles - left and right */
    300px 300px, /* Semi-circles - top and bottom */
    300px 300px; /* Quadrant-circles(?) - four corners */
  background-position:
    0 0,         /* Horizontal lines */
    -50px 0,     /* Vertical lines */
    -51px 0,     /* Diagonal lines - downward left ot right */
    -51px 0,     /* Diagonal lines - upward left to right */
    0px 0,       /* Central circle */
    150px 0,     /* Semi-circles - left and right */
    0 150px,     /* Semi-circles - top and bottom */
    150px 150px; /* Quadrant-circles(?) - four corners */
}

/* 300x300px box for demonstration purposes only */
.box {
  width: 300px;
  height: 300px;
  background-color: #222;
}

/* For demonstration purposes only*/
.container {
  float: left;
  text-align: center;
}
            
          
!
999px
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