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In this section:

https://docs.microsoft.com/en-us/windows/terminal/command-line-arguments?tabs=powershell#tab-color

You write: wt new-tab --tabColor #009999 ; split-pane --tabColor #f59218
It should be: wt new-tab --tabColor '#009999' `; split-pane --tabColor '#f59218'

You were missing the quotes around the RGB values and the backtick before the semicolon.

By the way, searching on the --tabColor issue eluded me, I had to figure it out by trial and error.

Document Details

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• ID: bd211ca4-58c5-fdb6-93c4-75b3ea7aa34f
• Version Independent ID: 0d5d0fe3-01ef-66e8-263d-a0a7852ffa7a
• Content: Windows Terminal command line arguments
• Content Source: TerminalDocs/command-line-arguments.md
• Product: dev-environment
• Technology: windows-terminal
• GitHub Login: @cinnamon-msft
• Microsoft Alias: cinnamon