fillStyle (a path styling attribute)

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context.fillStyle = color;

Sets the color that will be used to fill the interior of the current path.

These are color options (these must be quoted):

• A CSS named color, for example context.fillStyle='red'

• A hex color, for example context.fillStyle='#FF0000'

• An RGB color, for example context.fillStyle='rgb(red,green,blue)' where red, green & blue are integers 0-255 indicating the strength of each component color.

• An HSL color, for example context.fillStyle='hsl(hue,saturation,lightness)' where hue is an integer 0-360 on the color wheel and saturation & lightness are percentages (0-100%) indicating the strength of each component.

• An HSLA color, for example context.fillStyle='hsl(hue,saturation,lightness,alpha)' where hue is an integer 0-360 on the color wheel and saturation & lightness are percentages (0-100%) indicating the strength of each component and alpha is a decimal value 0.00-1.00 indicating the opacity.

You can also specify these color options (these options are objects created by the context):

• A linear gradient which is a linear gradient object created with context.createLinearGradient

• A radial gradient which is a radial gradient object created with context.createRadialGradient

• A pattern which is a pattern object created with context.createPattern

<!doctype html>
<html>
<head>
<style>
    body{ background-color:white; }
    #canvas{border:1px solid red; }
</style>
<script>
window.onload=(function(){

    // canvas related variables
    var canvas=document.getElementById("canvas");
    var ctx=canvas.getContext("2d");

    // stroke using a CSS color: named, RGB, HSL, etc
    ctx.fillStyle='red';
    ctx.fillRect(50,50,100,50);

    // stroke using a linear gradient
    var gradient = ctx.createLinearGradient(225,50,300,50);
    gradient.addColorStop(0,'red');
    gradient.addColorStop(1,'green');
    ctx.fillStyle=gradient;
    ctx.fillRect(200,50,100,50);

    // stroke using a radial gradient
    var gradient = ctx.createRadialGradient(100,175,5,100,175,30);
    gradient.addColorStop(0,'red');
    gradient.addColorStop(1,'green');
    ctx.fillStyle=gradient;
    ctx.fillRect(50,150,100,50);

    // stroke using a pattern
    var patternImage=new Image();
    patternImage.onload=function(){
        var pattern = ctx.createPattern(patternImage,'repeat');
        ctx.fillStyle=pattern;
        ctx.fillRect(200,150,100,50);
    }
    patternImage.src='http://i.stack.imgur.com/ixrWe.png';

    // for demo only, draw labels by each stroke
    ctx.fillStyle='black';
    ctx.textAlign='center';
    ctx.textBaseline='middle';
    ctx.font='14px arial';
    ctx.fillText('CSS color',100,40);
    ctx.fillText('Linear Gradient color',250,40);
    ctx.fillText('Radial Gradient color',100,140);
    ctx.fillText('Pattern color',250,140);

}); // end window.onload
</script>
</head>
<body>
    <canvas id="canvas" width=350 height=250></canvas>
</body>
</html>

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