I’ve set the link, background & text colours in Elementor Site Settings. However, this only seems to apply to Pages, and not to Posts.
Posts show a different set of colours, and I do not find anywhere to edit those colours. I simply want them to follow the same Site Settings that I established for pages.
Those colors are overridden by the theme CSS files. In order to change them you will need to add custom CSS under Appearance ->Customize ->Additional CSS. Kindly provide me with the URl to the example page and highlight the colors you would like to change, so I provide you with valid CSS.