CanvasRenderingContext2D.strokeStyle

The CanvasRenderingContext2D.strokeStyle property of the Canvas 2D API specifies the color or style to use for the lines around shapes. The default is #000 (black).

See also the chapter Applying styles and color in the Canvas Tutorial.

Syntax

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

Options

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

Examples

Using the strokeStyle property to set a different color

This is just a simple code snippet using the strokeStyle property to set a different color.

HTML

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

JavaScript

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

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

Edit the code below and see your changes update live in the canvas:

A strokeStyle example

This example uses the strokeStyle property to change the colors of the shapes' outlines. We use the arc() method to draw circles instead of squares.

var ctx = document.getElementById('canvas').getContext('2d');
for (var i=0;i<6;i++){
  for (var 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:

ScreenshotLive sample

Specifications

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

Browser compatibility

Feature Chrome Edge Firefox (Gecko) Internet Explorer Opera Safari
Basic support (Yes) (Yes) (Yes) (Yes) (Yes) (Yes)
Feature Android Chrome for Android Edge Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support (Yes) (Yes) (Yes) (Yes) (Yes) (Yes) (Yes) (Yes)
  • In WebKit- and Blink-based browsers, a non-standard and deprecated method ctx.setStrokeColor() is implemented besides this property.
    setStrokeColor(color, optional alpha);
    setStrokeColor(grayLevel, optional alpha);
    setStrokeColor(r, g, b, a);
    setStrokeColor(c, m, y, k, a);
    

See also

Document Tags and Contributors

 Contributors to this page: erikadoyle, Krenair, fscholz
 Last updated by: erikadoyle,