diff --git a/src/bin/bat/config.rs b/src/bin/bat/config.rs
index f1ec3d53..a0ee7ba3 100644
--- a/src/bin/bat/config.rs
+++ b/src/bin/bat/config.rs
@@ -140,9 +140,9 @@ fn get_args_from_str(content: &str) -> Result<Vec<OsString>, shell_words::ParseE
 pub fn get_args_from_env_vars() -> Vec<OsString> {
     [
         ("--tabs", "BAT_TABS"),
-        ("--theme", "BAT_THEME"),
-        ("--theme-dark", "BAT_THEME_DARK"),
-        ("--theme-light", "BAT_THEME_LIGHT"),
+        ("--theme", bat::theme::env::BAT_THEME),
+        ("--theme-dark", bat::theme::env::BAT_THEME_DARK),
+        ("--theme-light", bat::theme::env::BAT_THEME_LIGHT),
         ("--pager", "BAT_PAGER"),
         ("--paging", "BAT_PAGING"),
         ("--style", "BAT_STYLE"),
diff --git a/src/theme.rs b/src/theme.rs
index 41ce84e1..0276e5e0 100644
--- a/src/theme.rs
+++ b/src/theme.rs
@@ -5,6 +5,16 @@ use std::fmt;
 use std::io::IsTerminal as _;
 use std::str::FromStr;
 
+/// Environment variable names.
+pub mod env {
+    /// See [`crate::theme::ThemeOptions::theme`].
+    pub const BAT_THEME: &str = "BAT_THEME";
+    /// See [`crate::theme::ThemeOptions::theme_dark`].
+    pub const BAT_THEME_DARK: &str = "BAT_THEME";
+    /// See [`crate::theme::ThemeOptions::theme_light`].
+    pub const BAT_THEME_LIGHT: &str = "BAT_THEME";
+}
+
 /// Chooses an appropriate theme or falls back to a default theme
 /// based on the user-provided options and the color scheme of the terminal.
 ///