second commit

env/lib/python3.11/site-packages/rich_toolkit/utils/colors.py

@@ -0,0 +1,14 @@
+from rich.color import Color
+from rich.color_triplet import ColorTriplet
+
+
+def lighten(color: Color, amount: float) -> Color:
+    assert color.triplet
+
+    r, g, b = color.triplet
+
+    r = int(r + (255 - r) * amount)
+    g = int(g + (255 - g) * amount)
+    b = int(b + (255 - b) * amount)
+
+    return Color.from_triplet(ColorTriplet(r, g, b))