It’s called a mesh gradient and there are some generators for it if you want to take an easy route. For example https://meshgradient.com/. Source: about 1 year ago

If you want a bit more control and want to set your own colours, you can try meshgradient.com. It's free and the final image is exported as a high-resolution PNG. Source: over 1 year ago

You can download gradients, make them yourself with design software or gradient generators, and then animate them using basic CSS—Partiful uses a 12 second linear animation that basically scrolls a static gradient image. Source: over 1 year ago

Mesh gradient - I use this site to create the CSS needed https://meshgradient.com/. Source: over 1 year ago

If you are like me and struggle with finding an aesthetic cover for your Notion, I recommend you try out Mesh Gradients, the aesthetic is sooo good ;). Source: almost 2 years ago

Https://designmunk.com/ - Best landing pages example. Source: over 1 year ago

This a free web-design inspiration libraryyou need to fuel your next website design. Don’t fall for using “Awwards” website for inspiration. Use practical designs from other brands with help of this resource. (no-signup). Source: over 1 year ago

Designmunk. You'll find a lot on here that you will also find on the other sites, but its also pretty user friendly with its categories and filters, so always worth a 5-minute look. Source: about 2 years ago

Designmunk - A free library of landing page examples for inspiration. Source: about 2 years ago