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diff --git a/vendor/yansi-term/examples/256_colours.rs b/vendor/yansi-term/examples/256_colours.rs
new file mode 100644
index 000000000..1a222a755
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+++ b/vendor/yansi-term/examples/256_colours.rs
@@ -0,0 +1,76 @@
+extern crate yansi_term;
+use yansi_term::Colour;
+
+// This example prints out the 256 colours.
+// They're arranged like this:
+//
+// - 0 to 8 are the eight standard colours.
+// - 9 to 15 are the eight bold colours.
+// - 16 to 231 are six blocks of six-by-six colour squares.
+// - 232 to 255 are shades of grey.
+
+fn main() {
+    // First two lines
+    for c in 0..8 {
+        glow(c, c != 0);
+        print!(" ");
+    }
+    println!();
+    for c in 8..16 {
+        glow(c, c != 8);
+        print!(" ");
+    }
+    println!("\n");
+
+    // Six lines of the first three squares
+    for row in 0..6 {
+        for square in 0..3 {
+            for column in 0..6 {
+                glow(16 + square * 36 + row * 6 + column, row >= 3);
+                print!(" ");
+            }
+
+            print!("  ");
+        }
+
+        println!();
+    }
+    println!();
+
+    // Six more lines of the other three squares
+    for row in 0..6 {
+        for square in 0..3 {
+            for column in 0..6 {
+                glow(124 + square * 36 + row * 6 + column, row >= 3);
+                print!(" ");
+            }
+
+            print!("  ");
+        }
+
+        println!();
+    }
+    println!();
+
+    // The last greyscale lines
+    for c in 232..=243 {
+        glow(c, false);
+        print!(" ");
+    }
+    println!();
+    for c in 244..=255 {
+        glow(c, true);
+        print!(" ");
+    }
+    println!();
+}
+
+fn glow(c: u8, light_bg: bool) {
+    let base = if light_bg {
+        Colour::Black
+    } else {
+        Colour::White
+    };
+    let style = base.on(Colour::Fixed(c));
+    print!("{}", style.paint_fn(|f| write!(f, " {:3} ", c)));
+}