Been trying to modify the colors with lots of fail.

[RobFosterNYC]

I looked in the settings.json file and I cant find the place to edit the theme.
I would like to use the theme, but want to change just a few things within the theme to my liking.
Please inform me exactly where I can modify the colors of the theme.
Thank you.

PS>
Would love to use this theme for C++ language :)
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because the current one im using seems a bit dull.
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