“Create Beautiful, Smooth Gradients” I love that the tool helps you avoid the “gray zones”
color
Pika
“an easy to use, open-source, native colour picker for macOS”
Duotone Effect Generator
Handy and nicely executed.
Color wheel | Color schemes – Adobe Color CC
Colormind
“a deep learning AI that knows color theory. It can generate color palettes from scratch, or it can take your input and intelligently fill in the blanks “