Bing found the following results
HTML Color Picker - W3Schools
Coolors - The super fast color palettes generator!
List of colors - ColorHexa
Color - Wikipedia
Color Palettes for Designers and Artists - Color Hunt
Color | Definition, Perception, Types, & Facts | Britannica
Color wheel - color theory and calculator | Canva Colors
Create beautiful palettes with Adobe Color
ColorKit - Color Palettes, Gradients, Inspiration, and Color Tools
Color Hex - ColorHexa.com