I have been using Paletton for well over a decade now.
This colour scheme designer is easy to use and gives you the Colour Codes for all the colours it produces.

Smart people know it’s a waste of time to reinvent the wheel.

Paletton is a free online resource for generating Colour Schemes.
It is a useful tool when needing to find matching or contrasting colours with your base colour.

You don’t need to download anything!
Just go to https://paletton.com and use the 100% free tool.