Add support for arbitrary ANSI color

CHANGELOG.md

@@ -1,4 +1,5 @@
 # Unreleased
+- Added methods `ansi_color` and `on_ansi_color` to `Colorize`.
 
 # 3.0.0
 - **[BREAKING CHANGE]:** Upgrade MSRV to 1.80 and remove the then unnecessary lazy_static dependency.

src/color.rs

@@ -1,7 +1,7 @@
 use std::{borrow::Cow, cmp, env, str::FromStr};
 use Color::{
-    Black, Blue, BrightBlack, BrightBlue, BrightCyan, BrightGreen, BrightMagenta, BrightRed,
-    BrightWhite, BrightYellow, Cyan, Green, Magenta, Red, TrueColor, White, Yellow,
+    AnsiColor, Black, Blue, BrightBlack, BrightBlue, BrightCyan, BrightGreen, BrightMagenta,
+    BrightRed, BrightWhite, BrightYellow, Cyan, Green, Magenta, Red, TrueColor, White, Yellow,
 };
 /// The 8 standard colors.
 #[derive(Clone, Copy, Debug, PartialEq, Eq)]
@@ -24,6 +24,7 @@ pub enum Color {
     BrightCyan,
     BrightWhite,
     TrueColor { r: u8, g: u8, b: u8 },
+    AnsiColor(u8),
 }
 
 fn truecolor_support() -> bool {
@@ -56,6 +57,7 @@ impl Color {
                 self.closest_color_euclidean().to_fg_str()
             }
             Self::TrueColor { r, g, b } => format!("38;2;{r};{g};{b}").into(),
+            Self::AnsiColor(code) => format!("38;5;{code}").into(),
         }
     }
 
@@ -82,6 +84,7 @@ impl Color {
                 self.closest_color_euclidean().to_bg_str()
             }
             Self::TrueColor { r, g, b } => format!("48;2;{r};{g};{b}").into(),
+            Self::AnsiColor(code) => format!("48;5;{code}").into(),
         }
     }
 
@@ -192,6 +195,7 @@ impl Color {
                 b: 255,
             },
             TrueColor { r, g, b } => TrueColor { r, g, b },
+            AnsiColor(color) => AnsiColor(color),
         }
     }
 }

src/lib.rs

@@ -268,6 +268,13 @@ pub trait Colorize {
             b: color.b,
         })
     }
+    fn ansi_color<T>(self, color: T) -> ColoredString
+    where
+        Self: Sized,
+        T: Into<u8>,
+    {
+        self.color(Color::AnsiColor(color.into()))
+    }
     fn color<S: Into<Color>>(self, color: S) -> ColoredString;
     // Background Colors
     fn on_black(self) -> ColoredString
@@ -397,6 +404,13 @@ pub trait Colorize {
             b: color.b,
         })
     }
+    fn on_ansi_color<T>(self, color: T) -> ColoredString
+    where
+        Self: Sized,
+        T: Into<u8>,
+    {
+        self.on_color(Color::AnsiColor(color.into()))
+    }
     fn on_color<S: Into<Color>>(self, color: S) -> ColoredString;
     // Styles
     fn clear(self) -> ColoredString;