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Sketch dimension colors are not created per the Part Settings in the Customer
Defaults, they are displayed in black.
Solution
While in the Sketch Task Environment, go to Task --> Sketch Settings, toggle
OFF the option "Display Object Color" --> OK.
Notes and References
Hardware/Software Configuration
Platform: INTL64
OS: windows
OS Version: 764
Product: NX
Application: DESIGN
Version: V8.5
Function: SKETCHER
Ref: 001-7633794