This CSS code styles the .entry-time class which is one of the classes included in the post info entry meta.
Here’s the result after adding this code to the Genesis Sample child theme.
This code only works on this specific child theme and will need modifying for use on any other theme.
Ribbon Color Changes For Each Category
The CSS also changes the color of the ribbon based on which category the single post is assigned to. You will need to modify the classes to make them work with your category I.D’s or slugs.
Note: This code did take me several hours to tweak so please do understand it may take some time to get working correctly if you decide to use it on any theme other than the one i tested it on.