The CanvasRenderingContext2D.strokeStyle property of the Canvas 2D API specifies the color, gradient, or pattern to use for the strokes (outlines) around shapes. The default is #000 (black).

For more examples of stroke and fill styles, see Applying styles and color in the Canvas tutorial.


ctx.strokeStyle = color;
ctx.strokeStyle = gradient;
ctx.strokeStyle = pattern;


A DOMString parsed as CSS <color> value.
A CanvasGradient object (a linear or radial gradient).
A CanvasPattern object (a repeating image).


Changing the stroke color of a shape

This example applies a blue stroke color to a rectangle.


<canvas id="canvas"></canvas>


var canvas = document.getElementById('canvas');
var ctx = canvas.getContext('2d');

ctx.strokeStyle = 'blue';
ctx.strokeRect(10, 10, 100, 100);


Creating multiple stroke colors using loops

In this example, we use two for loops and the arc() method to draw a grid of circles, each having a different stroke color. To achieve this, we use the two variables i and j to generate a unique RGB color for each circle, and only modify the green and blue values. (The red channel has a fixed value.)

var ctx = document.getElementById('canvas').getContext('2d');

for (let i = 0; i < 6; i++) {
  for (let j = 0; j < 6; j++) {
    ctx.strokeStyle = `rgb(
        ${Math.floor(255 - 42.5 * i)},
        ${Math.floor(255 - 42.5 * j)})`;
    ctx.arc(12.5 + j * 25, 12.5 + i * 25, 10, 0, Math.PI * 2, true);

The result looks like this:

ScreenshotLive sample


Specification Status Comment
HTML Living Standard
The definition of 'CanvasRenderingContext2D.strokeStyle' in that specification.
Living Standard  

Browser compatibility

Update compatibility data on GitHub
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
strokeStyleChrome Full support YesEdge Full support 12Firefox Full support 1.5IE Full support YesOpera Full support YesSafari Full support YesWebView Android Full support YesChrome Android Full support YesFirefox Android Full support 4Opera Android Full support YesSafari iOS Full support YesSamsung Internet Android Full support Yes


Full support  
Full support

In WebKit- and Blink-based browsers, the non-standard and deprecated method ctx.setStrokeColor() is implemented in addition to this property.

setStrokeColor(color, optional alpha);
setStrokeColor(grayLevel, optional alpha);
setStrokeColor(r, g, b, a);
setStrokeColor(c, m, y, k, a);

See also