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HTML

              
                <canvas	width="600" height="400"></canvas>
	<div class="controls">
		<ul>
			<li class="red selected"></li>
			<li class="blue"></li>
			<li class="yellow"></li>
		</ul>
		<button id="revealColorSelect">New Color</button>
		<div id="colorSelect">
			<span id="newColor"></span>
			<div class="sliders">
				<p>
					<label for="red">Red</label>
					<input id="red" name="red" type="range" min=0 max=255 value=0>
				</p>
				<p>
					<label for="green">Green</label>
					<input id="green" name="green" type="range" min=0 max=255 value=0>
				</p>
				<p>
					<label for="blue">Blue</label>
					<input id="blue" name="blue" type="range" min=0 max=255 value=0>
				</p>
			</div>
			<div>
			<button id="addNewColor">Add Color</button>
			</div>
		</div>
	</div>
              
            
!

CSS

              
                body {
	background: #384047;
	font-family: sans-serif;
}
canvas {
	background: #fff;
	display: block;
	margin: 50px auto 10px;  
	border-radius: 5px;
	box-shadow: 0 4px 0 0 #222;
	cursor: crosshair;
}
.controls {
	min-height: 60px;
	margin: 0 auto;
	width: 600px;
	border-radius: 5px;
	overflow: hidden;
}
ul {
	list-style:none;
	margin: 0;
	float: 	left;
	padding: 10px 0 20px;
	width: 100%;
	text-align: center;
}

ul li, #newColor {
	display:block;
	height: 54px;
	width: 54px;
	border-radius: 60px;
	cursor: pointer;
	border: 0;
	box-shadow: 0 3px 0 0 #222;
}

ul li {
	display: inline-block;
	margin: 0 5px 10px;
}

.red {
	background: #fc4c4f;
}

.blue {
	background: #4fa3fc;
}

.yellow {
	background: #ECD13F;
}

.selected {
	border: 7px solid #fff;
	width: 40px;
	height: 40px;
}
button {
	background: #68B25B;
	box-shadow: 0 3px 0 0 #6A845F;
	color: #fff;
	outline: none;
	cursor: pointer;
	text-shadow: 0 1px #6A845F;
	display: block;
	font-size: 16px;
	line-height: 40px;
}
#revealColorSelect {
	border: none;
	border-radius: 5px;
	margin: 10px auto;
	padding: 5px 20px;
	width: 160px;
}

/* New Color Palette */

#colorSelect {
	background: #fff;
	border-radius: 5px;
	clear: both;
	margin: 20px auto 0;
	padding: 10px;
	width: 305px;
	position: relative;
	display: none;
}

#colorSelect:after {
	bottom: 100%;
	left: 50%;
	border: solid transparent;
	content: " ";
	height: 0;
	width: 0;
	position: absolute;
	pointer-events: none;
	border-color: rgba(255, 255, 255, 0);
	border-bottom-color: #fff;
	border-width: 10px;
	margin-left: -10px;
}

#newColor {
	width: 80px;
	height: 80px;
	border-radius: 3px;
	box-shadow: none;
	float: left;
	border: none;
	margin: 10px 20px 20px 10px;

}
.sliders p {
	margin: 8px 0;
	vertical-align: middle;
}
.sliders label {
	display: inline-block;
	margin: 0 10px 0 0;
	width: 35px;
	font-size: 14px;
	color: #6D574E;
}
.sliders input {
	position: relative;
	top: 2px;
}
#colorSelect button {
	border: none;
	border-top: 1px solid #6A845F;
	border-radius: 0 0 5px 5px;
	clear: both;
	margin: 10px -10px -7px;
	padding: 5px 10px;
	width: 325px;
}
              
            
!

JS

              
                // -------VARIABLES-------
var color = $('.selected').css('background-color');
// Store the canvas context:
var $canvas = $('canvas');
var ctx = $canvas[0].getContext('2d');
// --- Events ---
var lastEvent;
var mouseDown = false;

// ---------------SCRIPT--------------

// When clicking on the control list items
$(".controls").on('click','li',function() {
      // Remove selected from current
      $(this).siblings().removeClass('selected');
      // Apply selected to the new color
      $(this).addClass('selected');
      // cache current color
      color = $(this).css('background-color');
});

// ----- SHOWING / HIDING New Color Panel -----

// When "New color" is clicked
$("#revealColorSelect").click(function() {
    // show the "Add color" panel or hide it
    changeColor();
    $("#colorSelect").toggle();
}) ;

// When color sliders change
$('input[type=range]').change(changeColor);

function changeColor() {
  var r = $("#red").val();
  var g = $("#green").val();
  var b = $("#blue").val();
  $('#newColor').css('background-color', 'rgb('+r+','+g+','+b+')'); //update the color <span>

}

// When "Add Color" is pressed"
$('#addNewColor').click(function() {
  color = $('#newColor').css('background-color');
  
      // append the new color to the controls
  var $newColor = $("<li></li>");
  $newColor.css('background-color', color);
  $(".controls ul").append($newColor);
    // select the new color
  $newColor.click();
});

// ------ CANVAS -------

$canvas.mousedown(function(e) {
  lastEvent = e;
  mouseDown = true;
  }).mousemove(function(e) {
    // draw lines
    if (mouseDown) {
      ctx.beginPath();
      ctx.lineWidth="3";
      ctx.strokeStyle= color; // Setting color of the path
      ctx.moveTo(lastEvent.offsetX,lastEvent.offsetY); 
      ctx.lineTo(e.offsetX,e.offsetY);
      ctx.stroke();
      lastEvent = e;
    }
      }).mouseup(function() {
          mouseDown = false;
        }).mouseleave(function() {
            $canvas.mouseup();
          });

              
            
!
999px

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