Based on testing ngscopeclient (*.msi installer from e0dd8c5 build) on Windows with various shells:
Command Prompt:

Powershell:

It seems like there are workarounds/ways to enable ANSI colors (at least in Powershell, less sure about regular cmd.exe), but regardless, ANSI escape codes should be suppressed for terminals that lack support or do not have ANSI colors enabled.
Interestingly, using Microsoft Terminal (microsoft/terminal) with either of these shells supports ANSI colors:

