-
Notifications
You must be signed in to change notification settings - Fork 2
/
colour-maker.html
50 lines (48 loc) · 2.03 KB
/
colour-maker.html
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<style>
h1{text-align:center;color:red;text-shadow:2px 2px 8px olive;}
</style>
</head>
<body>
<h1>Interactive Colour Maker</h1>
<p>The animation allows you to use the three primary colours - red, gree and blue - to produce any other colour that you can think of.</p>
<p> In theory, it can produce 16-million colours, depending on the values of red, green and blue.</p>
<canvas id="myCanvas" width="400" height="300" class="img-responsive" style="margin-top:15px;margin-bottom:15px;"></canvas><br />
<table>
<tr>
<td><span style="color:red;font-weight:bold;">Red</span></td><td>0 <input type="range" id="redp" name="points" value="50" min="0" max="255" onchange="fun()" /> 255</td>
</tr>
<tr>
<td><span style="color:green;font-weight:bold;">Green</span></td><td>0 <input type="range" id="greenp" name="points" value="50" min="0" max="255" onchange="fun()" /> 255</td>
</tr>
<tr>
<td><span style="color:blue;font-weight:bold;">Blue</span></td>
<td>0 <input type="range" id="bluep" name="points" value="50" min="0" max="255" onchange="fun()" /> 255</td>
</tr>
</table>
<script>
var canvas = document.getElementById('myCanvas');
var context = canvas.getContext('2d');
var radr;var radg;var radb;
function fun() {
// red value;
radr=eval(document.getElementById('redp').value);
// green value;
radg=eval(document.getElementById('greenp').value);
// blue value;
radb=eval(document.getElementById('bluep').value);
// rgb value for fillStyle
var col='rgb('+radr+','+radg+','+radb+')';
context.clearRect(0,0,400,300);
context.beginPath();
// colour circle
context.arc(200,150,100,0,2*Math.PI,false);
context.fillStyle=col;
context.fill();
}
</script>
</body>
</html>