From the core:
www.colourlovers.com - ready palette from which to push off or use as is (ideal for prototyping)
https://colorscheme.ru/ - selection palette on the color schemes with handy extra tools (a fine selection of close colors, text overlay, preview on conditional website, etc.)
https://color.adobe.com/ru/create/color-wheel/ - selection palette on the color schemes, manual selection of a palette image and the presets