CanvasRenderingContext2D: strokeStyle property

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.

See full compatibility

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 black.

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

Value

One of the following:

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

Examples

Changing the stroke color of a shape

This example applies a blue stroke color to a rectangle.

HTML

html

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

JavaScript

const canvas = document.getElementById("canvas");
const ctx = canvas.getContext("2d");

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

Result

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.)

<canvas id="canvas" width="150" height="150"></canvas>

const ctx = document.getElementById("canvas").getContext("2d");

for (let i = 0; i < 6; i++) {
  for (let 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();
  }
}

The result looks like this:

Specifications

Specification
HTML # dom-context-2d-strokestyle-dev

Browser compatibility

	desktop					mobile
	Chrome	Edge	Firefox	Opera	Safari	Chrome Android	Firefox for Android	Opera Android	Safari on iOS	Samsung Internet	WebView Android	WebView on iOS
`strokeStyle`	Chrome – Full support Chrome 1 (Release date: 2008-12-11) footnote Full support	Edge – Full support Edge 12 (Release date: 2015-07-29) footnote Full support	Firefox – Full support Firefox 1.5 (Release date: 2005-11-29) footnote Full support	Opera – Full support Opera 12.1 (Release date: 2012-11-20) footnote Full support	Safari – Full support Safari 2 (Release date: 2005-04-29) footnote Full support	Chrome Android – Full support Chrome Android 18 (Release date: 2012-06-27) footnote Full support	Firefox for Android – Full support Firefox for Android 4 (Release date: 2011-03-29) footnote Full support	Opera Android – Full support Opera Android 12.1 (Release date: 2012-10-09) footnote Full support	Safari on iOS – Full support Safari on iOS 1 (Release date: 2007-06-29) footnote Full support	Samsung Internet – Full support Samsung Internet 1 (Release date: 2013-04-27) footnote Full support	WebView Android – Full support WebView Android 4.4 (Release date: 2013-12-09) footnote Full support	WebView on iOS – Full support WebView on iOS 1 (Release date: 2007-06-29) footnote Full support

Tip: you can click/tap on a cell for more information.

Full support: Full support

WebKit/Blink-specific note

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

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

CanvasRenderingContext2D: strokeStyle property

HTML

JavaScript

Result

Legend