The Sun tarot card represents vitality, success, and positivity. In a reading, it can indicate a time of joy, happiness, and accomplishment.
 
In a New Orleans and Mardi Gras-themed reading, the Sun card can take on additional meanings. It can represent the vibrant energy and celebration of the city, as well as the success and prosperity that the Mardi Gras season brings. The card can also represent the warmth and light of the sun, symbolizing the joy and positivity that the festivities bring to the city and its inhabitants.
 
The image on the card may feature the sun, with its bright rays shining down on the city. The sun can also be depicted as a symbol of the Mardi Gras Queen. 
 
Overall, the Sun card in a New Orleans and Mardi Gras reading can signify a time of happiness, success, and positivity. It encourages you to embrace the joy and celebration of the season and to let the warmth and light of the sun guide you towards success and prosperity.