At the Skate America competition in 1991, Harding wore a bright pink outfit that more than stood out to judges and spectators. Even though I, Tonya doesn't put a lot of emphasis on the routine at the particular occasion, it marks Harding's journey in a different way: it shows the unfair judgment she faced from the judges.
Tonya can be seen working on this particular outfit in a couple of scenes leading up to the competition. She's clearly putting a lot of work into it — sewing the whole outfit herself, paying special attention to design, and even asking for input. Sadly, this outfit is also part of the judge's tendency to view her as "white trash," since it's a flashy and not as refined outfit.
In the film's trailer, you can see how the moment plays out on screen. Tonya skates up to the judges, demanding a fair shot at a better score. When the judge says they also base their scores on "presentation," she spits out an acid retort: "Suck my d*ck."