How can I revise a category to show only titles in BLACK TEXT and author followed by date (In grey text) all on one line.

TITLE, Author, Date
TITLE, Author, Date
TITLE, Author, Date
TITLE, Author, Date
TITLE, Author, Date
TITLE, Author, Date

Provided in a simple list

a) Create a set of overrides by copying the core K2 template files into your Joomla template's structure: getk2.org/documentation/tutorials/174-templating-with-k2-and-the-concepts-of-sub-templates

b) Set the category or categories to only display these 3 content elements (title, author, date).

c) Style the output with CSS or modify the override's HTML output to be a table, whichever you prefer.

Any chance you could provide simple style code for simple list (title, author, date).

It's beyond the scope of support provided in this forum.

Anything related to template styling should be directed to the template provider.