A canvas strokeStyle example

    function boot() {
      draw(document.getElementById('canvas').getContext('2d'));
      draw(document.getElementById('vmlcanvas').getContext('2d'));
    }
    function draw(ctx) {
      var i, j;
      for (i=0;i<6;i++){
        for (j=0;j<6;j++){
          ctx.strokeStyle = 'rgb(0,' + Math.floor(255-42.5*i) + ',' + 
                           Math.floor(255-42.5*j) + ')';
          ctx.beginPath();
          ctx.arc(12.5+j*25,12.5+i*25,10,0,Math.PI*2,true);
          ctx.stroke();
        }
      }
    }