DJ Pon-3 or Vın̈yl Scratch is a unicorn pony who performs as a disc jockey in Suited For Success and A Canterlot Wedding - Part 2, whose name was given by fans. The character also appears in the "There's a Pony For That" commercial and other promotional material.
While DJ Pon-3's coat appears white in her first scene, a layout artist on the show noted that the character model's coat color is actually a very pale yellow, specifically the 24-bit hex triplet #FEFDE7. This is more clearly seen in the episode, "A Canterlot Wedding - Part 2". Her coat color in the DJ Pinkie Pie game is the same, while her Playful Ponies toy is white. Her eye color is also revealed in A Canterlot Wedding - Part 2 to be Moderate cerise, the same as that of Rainbow Dash.