Configuration

Railscasts has one configuration interface:

require("railscasts").setup({
  high_contrast = false,
  transparent = false,
  darker_background = false,
  dim_inactive = false,
})

vim.cmd.colorscheme "railscasts"

All options are booleans. Unknown option names and non-boolean values are rejected.

Options

Option	Default	Effect
high_contrast	false	Brightens muted comment/metadata text and the dark-green active surface without changing the default palette.
transparent	false	Leaves main and floating-window backgrounds unset so the terminal or Neovim UI supplies the surface.
darker_background	false	Uses the opt-in #1F1F1F solid editor and terminal surface. Cannot be combined with transparent.
dim_inactive	false	Uses muted text in inactive windows and their winbars.

Use high_contrast when readability takes precedence over a strict historical match. Use darker_background for a darker solid Railscasts surface, or transparent with a terminal background you deliberately control; they are mutually exclusive. dim_inactive preserves focus by reducing the visual weight of inactive windows.

Diagnose the active theme

Run :checkhealth railscasts after loading the colorscheme to validate Neovim capabilities, active options, and the ANSI terminal palette. See Health Check.