How to Prevent CSS Gradient Banding

How can I prevent CSS gradient banding?

I know you won't like the sound of this, but the only real way right now to get a consistent cross-browser aesthetic in this case, is to use a repeating image.

If it's a simple linear gradient, then you only need it to be 1px wide and as high as the gradient, then make the background colour of the page as the final colour of the gradient so it runs smoothly. This will keep file size tiny.

If you want to reduce gradient bands in your image, use a PNG (not transparency) as I find these to be better suited than JPG's for this purpose.

In Adobe Fireworks, I would export this as a PNG-24.

Good luck.

http://codepen.io/anon/pen/JdEjWm

#gradient {
  position: absolute;
  width: 100%;
  height: 100%;
  background: -webkit-gradient(linear, 0% 0%, 0% 100%, from(black), to(white));
  background: -webkit-linear-gradient(top, black, white);
  background: -moz-linear-gradient(top, black, white);
  background: -ms-linear-gradient(top, black, white);
  background: -o-linear-gradient(top, black, white);
  background: linear-gradient(top, black, white);
}

How to remove banding of gradient background

To make the background fill the webpage, you should give the html element a property of height: 100%, and the background a property of no-repeat like so :

html{
    height:100%
}

body {
    background: linear-gradient(to bottom, #17748b, #003a8b) no-repeat;
}

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>

</body>
</html>

How to make CSS gradient look smooth?

One day, I hope, we've got this:

linear-gradient(
  to top,
  hsla(330, 100%, 45%, 0),
  cubic-bezier(0.45, 0, 0.5, 0.5),
  hsla(330, 100%, 45%, 1)
);

Bot for now, we have this:

PostCSS plugin with 2 options: https://github.com/larsenwork/postcss-easing-gradients
An app allowng you to choose an easing function: https://larsenwork.com/easing-gradients/

webkit linear gradient causes banding in Chrome or Safari

Looks like a webkit bug. I came up with the work-around below, tested on the latest Chrome and FF. In short, you'll position a div containing the background behind your main content. I also added a few styles to make IE happier.

Given this HTML:

<html lang="en">
<head>
    <style>
        ...
    </style>
</head>
<body>
    <div class="background">bgdiv</div>
    <div class="content_pane">
        <div class="titlebar">Leave a Comment!</div>
        <div class="comment">Your Comment.</div>
    </div>
</body>
</html>

Combined with this stylesheet:

    body{
        background-color: #f3ffff;
        min-height: 100%;
        margin:0px;
    }
    .background {
        height: 250px;
        left: 0;
        position: absolute;  /* could use fixed if you like. */
        right: 0;
        top: 0;
        z-index: -10;

        background-image:
            -webkit-linear-gradient(top,
                rgba(99, 173, 241, 1) 0px,
                rgba(0, 255, 255, 0) 250px
            );
        background-image:
            -moz-linear-gradient(top,
                rgba(99, 173, 241, 1) 0px,
                rgba(0, 255, 255, 0) 250px
            );
        background-image:
            -o-linear-gradient(top,
                rgba(99, 173, 241, 1) 0px,
                rgba(0, 255, 255, 0) 250px
            );
        background-image:
            -ms-linear-gradient(top,
                rgba(99,173,241,1) 0%,
                rgba(0,255,255,0) 250px
            ); /* IE10+ */
        filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#63adf1', endColorstr='#0000ffff',GradientType=0 ); /* IE6-9 */
        background-image:
            linear-gradient(top,
                rgba(99,173,241,1) 0%,
                rgba(0,255,255,0) 250px
            ); /* W3C */
        background-position: center top, center top;
        background-repeat: no-repeat, repeat-x;
    }
    .content_pane {
        background: white;
        border: 1px dotted white;
        border: 1px solid grey;
        font-family: arial, sans;
        font-weight: bold;
        margin: 6em auto 5em;
        width: 50%;
    }
    .titlebar {
        background: #3f7cdb;
        color: white;
        font-family: arial, sans;
        padding: .25em 2ex .25em;
    }
    .comment {
        padding: 1em;
    }

It should come out looking like this, regardless of window size:

Chrome image

How to Prevent CSS Gradient Banding

How can I prevent CSS gradient banding?

How to remove banding of gradient background

How to make CSS gradient look smooth?

webkit linear gradient causes banding in Chrome or Safari

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