CanvasRenderingContext2D.fillStyle

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

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

Syntax

<var>ctx.fillStyle = color;
</var><var>ctx.fillStyle = gradient;
</var><var>ctx.fillStyle = pattern;</var>

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 fillStyle property to set a different color

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

HTML

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

JavaScript

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

ctx.fillStyle = "blue";
ctx.fillRect(10, 10, 100, 100);

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

<canvas id="canvas" width="400" height="200" class="playable-canvas"></canvas>
<div class="playable-buttons">
  <input id="edit" type="button" value="Edit" />
  <input id="reset" type="button" value="Reset" />
</div>
<textarea id="code" class="playable-code">
ctx.fillStyle = "blue";
ctx.fillRect(10, 10, 100, 100);</textarea>

var canvas = document.getElementById("canvas");
var ctx = canvas.getContext("2d");
var textarea = document.getElementById("code");
var reset = document.getElementById("reset");
var edit = document.getElementById("edit");
var code = textarea.value;

function drawCanvas() {
  ctx.clearRect(0, 0, canvas.width, canvas.height);
  eval(textarea.value);
}

reset.addEventListener("click", function() {
  textarea.value = code;
  drawCanvas();
});

edit.addEventListener("click", function() {
  textarea.focus();
})

textarea.addEventListener("input", drawCanvas);
window.addEventListener("load", drawCanvas);

A fillStyle example with for loops

In this example, we use two for loops to draw a grid of rectangles, each in a different color. The resulting image should look something like the screenshot. There is nothing too spectacular happening here. We use the two variables i and j to generate a unique RGB color for each square, and only modify the red and green values. The blue channel has a fixed value. By modifying the channels, you can generate all kinds of palettes. By increasing the steps, you can achieve something that looks like the color palettes Photoshop uses.

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

var ctx = document.getElementById('canvas').getContext('2d');
for (var i=0;i<6;i++){
  for (var j=0;j<6;j++){
    ctx.fillStyle = 'rgb(' + Math.floor(255-42.5*i) + ',' +
                     Math.floor(255-42.5*j) + ',0)';
    ctx.fillRect(j*25,i*25,25,25);
  }
}

The result looks like this:

Screenshot	Live sample

Specifications

Browser compatibility

WebKit/Blink-specific notes

• In WebKit- and Blink-based browsers, a non-standard and deprecated method ctx.setFillColor() is implemented besides this property.
  JavaScript

  Copy Code

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

See also

• The interface defining it, CanvasRenderingContext2D
• CanvasGradient
• CanvasPattern