Ralph Fox’s p-colorings offer the simplest yet effective invariants of knots. This exposition, based on the 2020 Lewis-Parker Lecture delivered by the author, introduces the method of knot coloring as well as some historical background.
Silver, Daniel, "Part 5: A Colorful Approach to Knot Theory (or: “How Happy I Could Be With Ether”)" (2023). A Five-Minute History of Knot Theory. 1.