You can view this site running at https://gradients.jacob-foster.com.
If you encounter a color that you like, you can share it by adding it as a hash to the end of the URL. Supported inputs are hex, rgb, and hsl.
https://gradients.jacob-foster.com/?FF0000
https://gradients.jacob-foster.com/?F00
https://gradients.jacob-foster.com/?rgb(255,0,0)
https://gradients.jacob-foster.com/?hsl(0,100,50)
This is a simple site designed to allow you to generate gradients. It is based on Finally, a definitive way to make gradients beautiful by Rene Brandel.