“Create Beautiful, Smooth Gradients” I love that the tool helps you avoid the “gray zones”
color
OKLCH in CSS: why we moved from RGB and HSL
Make Beautiful Gradients in CSS, with linear-gradient, radial-gradient, or conic-gradient.
Gradient Generator
Pika
“an easy to use, open-source, native colour picker for macOS”
Duotone Effect Generator
Handy and nicely executed.