prettier bars

examples/bars.py

@@ -6,6 +6,7 @@ Use Bar to renderer a sort-of cirlce.
 import math
 
 from rich.bar import Bar
+from rich.color import Color
 from rich import print
 
 
@@ -14,5 +15,6 @@ SIZE = 40
 for row in range(SIZE):
     y = (row / SIZE) * 2 - 1
     x = math.sqrt(1 - y * y)
-    bar = Bar(1, width=SIZE * 2, begin=1 - x, end=x, color="red")
+    color = Color.from_rgb((y + 1) * 127, 0, 0)
+    bar = Bar(1, width=SIZE * 2, begin=1 - x, end=x, color=color)
     print(bar)

rich/color.py

@@ -339,6 +339,21 @@ class Color(NamedTuple):
         """
         return cls(name=triplet.hex, type=ColorType.TRUECOLOR, triplet=triplet)
 
+    @classmethod
+    def from_rgb(cls, red: float, green: float, blue: float) -> "Color":
+        """Create a truecolor from three color components in the range(0->255).
+
+        Args:
+            red (float): Red component.
+            green (float): Green component.
+            blue (float): Blue component.
+
+        Returns:
+            Color: A new color object.
+        """
+        triplet = ColorTriplet(int(red), int(green), int(blue))
+        return cls.from_triplet(triplet)
+
     @classmethod
     def default(cls) -> "Color":
         """Get a Color instance representing the default color.

tests/test_color.py

@@ -67,6 +67,12 @@ def test_from_triplet() -> None:
     )
 
 
+def test_from_rgb() -> None:
+    assert Color.from_rgb(0x10, 0x20, 0x30) == Color(
+        "#102030", ColorType.TRUECOLOR, None, ColorTriplet(0x10, 0x20, 0x30)
+    )
+
+
 def test_default() -> None:
     assert Color.default() == Color("default", ColorType.DEFAULT, None, None)