Line 10 (Turquoise) (Portuguese: Linha 10 – Turquesa), formerly Line D (Beige), is one of the seven lines operated by CPTM and one of the thirteen lines that make up the São Paulo Metro Rail Transport Network, in Brazil.

[1] As of August 2023, most trains running at this line are part of the 8500 and 9500 Series, created by CAF and Hyundai Rotem, respectively, given the unification of the line with Line 7 - Ruby, by the 710 Service, inaugurated in 2021.

Initially, most trains running at this line were part of the 2100 Series (Originally called CAF 440).

Imported from Spain, this model was projected to take long journeys; therefore, they now only run at the ABC Express, that works at peak-hours between Tamanduateí and Santo André stations.

2100's compositions have only six cars, as opposed of the eight-cars regular compositions.