Making a colour field

[Leo_Red]

Hi, I was making a pixel editor in python using pygame. So, I was checking sites to how to do specific things before starting and I did not find a way to make a colour field using pygame or any other libs I can use with pygame (Not sure with GUI libs). I could just stick with a simple RGB slider, but that is very annoying to use and not very intuitive to use. Alpha value would also be useful (RGBA). I am like using a colour field, but a colour field would also be fine.I would really need some help with this as I am not an expert. If you are cunfused what a "colour field" is, here is a photo(Because I was),

colour field:
https://www.google.com/search?q=RGBA+col...B_DG1lnt2M

colour wheel:
https://www.google.com/search?q=RGBA+col...9kLsFH4D-M