As a recent introduction to the pack, jokers do not have any standardized appearance across the card manufacturing industry. Each company produces their own depictions of the card.
The publishers of playing cards trademark their jokers, which have unique artwork that often reflect contemporary culture.
Out of convention, jokers tend to be illustrated as jesters. There are usually two Jokers per deck, often noticeably different. For instance, the United States Playing Card Company (USPCC) prints their company's guarantee claim on only one.
More common traits are the appearance of colored and black/non-colored Jokers. At times, the Jokers will each be colored to match the colors used for suits; there will be a red Joker, and a black Joker. In games where the jokers may need to be compared, the red, full-color, or larger-graphic Joker usually outranks the black, monochrome, or smaller-graphic one. If the joker colors are similar, the joker without a guarantee will outrank the guaranteed one.
With the red and black jokers, the red one can alternately be counted as a heart/diamond and the black is used to substitute clubs/spades. The Unicode for playing cards provide symbols for three jokers: red, black, and white.