Canva's image filters work similarly to filters ... and you can also use the color picker to add a new color—using the gradient color picker or typing in the name or hex code of a color.

Google’s new logo keeps the same letterform, as well as the bright red-yellow-green-blue color sequence, but now those colors ...

Color gradient filament is fun stuff to play with. It lets you make 3D prints that slowly fade from one color to another along the Z-axis. [David Gozzard] wanted to do some printing with this ...

Otherwise, you can tell WallCreator you want to generate another image and start over ... WallCreator will generate a random solid color and create a wallpaper for it; pick Random Gradient instead, ...