How to Change Background Color using HTML Rounded Slider ?

Last Updated : 01 Apr, 2024

To Change the Background Color using an HTML rounded slider that dynamically changes the webpage’s background as the slider thumb is moved along its track, giving a visual indication of the selected color. The approach provides a convenient method for customizing the visual appearance of the webpage in real-time.

Approach

The HTML document defines a slider that changes the webpage’s background color when the slider thumb is moved.
The slider input element is defined with the ID “myRange”. It has a minimum value of 0, a maximum value of 100, and an initial value of 50. After getting the input, the function “changeBackgroundColor()” is called.
The JavaScript function retrieves the value of a range slider with the id “myRange”.
It then constructs an HSL color string based on the slider’s value, with full saturation and 50% lightness.
Finally, it sets the background color of the entire web page’s body to the generated color string. This function dynamically changes the webpage’s background color as the user adjusts the slider.

Example: Implementation of changing background color using HTML rounded slider.

HTML

<!DOCTYPE html>
<html>

<head>
    <meta name="viewport" 
          content="width=device-width, 
                   initial-scale=1">
    <title>Custom Rounded Range Slider</title>

    <style>
        body {
            background-color: yellow;
        }

        h1 {
            text-align: center;
        }

        .slidecontainer {
            width: 100%;
        }

        .custom-slider-range:hover {
            opacity: 1.2;
        }

        .custom-slider-range {
            -webkit-appearance: none;
            appearance: none;
            width: 100%;
            height: 25px;
            background: linear-gradient(to right,
              red, yellow, green);
            outline: none;
            opacity: 0.8;
            transition: opacity 0.4s;
            border-radius: 15px;
        }

        .custom-slider-range::-moz-range-thumb {
            width: 25px;
            height: 25px;
            background: #fff;
            border: 2px solid #000;
            border-radius: 50%;
            cursor: pointer;
        }
    </style>
</head>

<body>

    <h1>Change Background Color 
      using HTML Rounded Slider</h1>

    <div class="slidecontainer">
        <input type="range" min="1" 
               max="100" 
               value="50" 
               class="custom-slider-range"
               id="myRange" 
               oninput="changeBackgroundColor()">
    </div>

    <script>
        function changeBackgroundColor() {
            let slider = document.getElementById("myRange");
            let value = slider.value;
            let color = 'hsl(' + value + ', 100%, 50%)';
            document.body.style.background = color;
        }
    </script>

</body>

</html>