New wave gradients in the latest web browsers

Lately, I've been receiving numerous complaints about poorly rendered gradients involving CSS, Canvas, and SVG.

Since the rendering quality varies depending on the browser and operating system, I am unable to provide a one-size-fits-all minimal, complete, verifiable example (MCVE). Instead, I will highlight a specific issue with a simple CSS gradient that is displaying incorrectly on Chrome/Ubuntu (showing vertical stripes):

body {
    background: linear-gradient(90deg, #111, #444);
}

While I am interested in finding a solution for this particular problem, I would appreciate even more a universal fix for achieving smooth, consistent gradients. Solutions involving Canvas or images are not feasible as my project involves numerous gradients, which are dynamic and often partially transparent.

htmlcsslinear-gradients

Answer №1

It's not necessarily the fault of the OS or Browser in many cases, but rather a lack of understanding about how gradients function and why they are structured.

The issue often lies in the luminosity of each color within the gradient. By adjusting the darkness or lightness of certain colors, the pattern can be diminished or eliminated entirely. See the comparison below to understand how slight changes in luminosity affect the overall appearance of the gradient.

https://i.sstatic.net/NxSeL.png

When looking at the RGB Color wheel, it becomes clear why some gradients may appear flawed. By adding additional stops in the gradient, such as green, we can avoid washed out spots and create a more vibrant look.

https://i.sstatic.net/G7dwm.png https://i.sstatic.net/vKMYY.png

To address the issue of patterns in gradients, consider transitioning through a color space based on luminosity, like the HSL color space. A comparison between gradients in RGB and HSL shows that banding is significantly reduced in the latter. Utilizing tools available online for generating gradients in different color spaces can help achieve a more natural and visually pleasing result.

https://i.sstatic.net/xKcIm.png

https://i.sstatic.net/EDXQQ.png

In conclusion, the key to resolving gradient pattern issues lies in understanding and manipulating luminosity levels. While external factors like monitors, browsers, and operating systems can play a role, adjusting the color space used in gradients can greatly improve their appearance.

Answer №2

The visual effect you are observing is known as banding. When viewing gradients, Chrome in Windows 10 uses a technique called dithering, while Firefox does not. This behavior can vary between different browsers.

Here are some helpful links related to this topic:

As far as I know, the issue cannot be resolved without using an image for the gradient. It is possible that FireFox may implement gradient dithering in a future update.

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