The decision was made by the Los Angeles City Section Monday.
"Uniform colors may only be a combination of the official school colors. Pink is not a school color at Narbonne. Penalties will include probation and forfeiture of contents," the California Interscholastic Federation said in a statement.
The school is appealing the decision in hopes of playing in the championship game Saturday.
Watch Curt Sandoval's report above from Eyewitness News.