How do I enable true color (24-bit) support in Vim?

Explanation

The termguicolors option enables 24-bit RGB color support, allowing color schemes to use millions of colors instead of the terminal's 256-color palette.

How it works

• :set termguicolors enables true color mode
• Color schemes use guifg/guibg values even in terminal Vim
• Requires a terminal that supports true color

Example

set termguicolors
colorscheme onedark

Tips

• Most modern terminals support true color (iTerm2, Alacritty, kitty, Windows Terminal)
• Test with :echo $TERM — should be xterm-256color or similar
• Some terminals need t_8f and t_8b settings in Vim
• Neovim has better true color support out of the box
• Many popular color schemes look much better with true colors