

This really only affects the prompt, not the terminal colors, which are controlled by your terminal emulator zshrc env ZSH_THEME with this Gruvbox colored one, or just tweak the colors of the full theme list.

True Color enabled in iTerm2, Zsh, and Vim.

The contrib repo has the theme for different app formats, including iTerm2, SpaceVim, Tilix, and tmux. It supports light and dark modes, as well as various contrast options. I'm now using the community fork which is better maintained. I like having matching true-color themes in all my shell apps I use this to keep the shell minimal without distractions for presenting. Here's my custom Zsh prompt theme with 🐳 emoji and a "presentation mode" option.but also has colors you can tweak (see below) Oh-My-Zsh has themes, which mostly affect the prompt features like git branch, current directory, etc.
#Iterm oh my zsh how to
Check their GitHub wiki for more info and how to customize
