Tag Archives: linear

Linear gradients

In this tutorial you will learn how to add a linear gradient background to a div. A linear gradient is where one colour gradually changes into another colour.

A linear gradient can change colours gradually from left to right, right to left, top to bottom, or the bottom to top of a div. A gradient involves at least two different colours but can include multiple colours. Below is an example of a linear gradient that involves three colours (dark green, yellow, light green).

Screen Shot 2015-05-14 at 8.25.45 pm

The example above is obviously a dramatic example. Make sure you use colours that work well together and that work well with the rest of the theme on your website. Using different shades of a colour for a gradient can be used to give a div a little depth or a nice shadow effect if used effectively.

Watch the video below to see how to create linear gradients and then scroll down to see the sample HTML and CSS code.

Here is the sample HTML code:

<!DOCTYPE html>
<html>
<head>
 <title>Linear gradients</title>
 <link rel="stylesheet" href="resources/stylesheet14.css"/>
</head>
 
<body>
 <div class="round_box">
 <p>This box has rounded corners and a linear gradient.</p>
 </div>
</body>
</html>

Here is the sample CSS code:

.round_box{
 background-color:#31D457;
 width:250px;
 text-align:center;
 padding: 30px 20px;
 border-radius:20px;
 background-image:linear-gradient(to bottom, #175E0C, #DBF022, #37DE1C);
}

Using colour gradients and patterns

The code below shows how to use linear and radial gradients to fill rectangle shapes.

The three shapes will look like this (linear gradient on top left, radial gradient on top right, image pattern on bottom left side):

Screen Shot 2015-05-08 at 6.53.39 pm

Watch the video below and then scroll down to see the sample code.

Here is the code:

<!DOCTYPE html>
<html>
<head>
 <title>Gradients and patterns</title>
 <style>
 #myCanvas{
 background-color: white;
 border: 1px solid black;
 }
 </style>
 
 <script>
 var patternImage = new Image();
 patternImage.src = "pattern.png";
 function draw(){
 var ctx = document.getElementById("myCanvas").getContext("2d");
 var gradient = ctx.createLinearGradient(0,0,150,0); // x1, y1, x2, y2 
 gradient.addColorStop(0, "red");
 gradient.addColorStop(0.5, "yellow");
 gradient.addColorStop(1, "green");
 ctx.fillStyle = gradient;
 ctx.strokeStyle = "blue";
 ctx.fillRect(0,0,150,75);
 ctx.strokeRect(0,0,150,75);
 
 var gradient2 = ctx.createRadialGradient(350,100,0,350,100,200);
 // ctx.createRadialGradient parameters are x1, y1, r1, x2, y2, r2
 gradient2.addColorStop(0, "yellow");
 gradient2.addColorStop(1, "blue");
 ctx.fillStyle = gradient2;
 ctx.strokeStyle = "blue";
 ctx.fillRect(250,0,200,200);
 ctx.strokeRect(250,0,200,200);
 
 var pattern = ctx.createPattern(patternImage, "repeat");
 ctx.fillStyle = pattern;
 ctx.strokeStyle = gradient;
 ctx.lineWidth = 20;
 ctx.fillRect(20,150,200,200);
 ctx.strokeRect(20,150,200,200);
 }
 window.onload=draw;
 </script>
</head>
<body>
 <canvas id="myCanvas" width="500" height="400">
</body>
</html>

Next tutorial: Simple animations using JavaScript