diff --git a/.github/workflows/pythonpackage.yml b/.github/workflows/pythonpackage.yml
index e8c82566..d34a9940 100644
--- a/.github/workflows/pythonpackage.yml
+++ b/.github/workflows/pythonpackage.yml
@@ -28,4 +28,6 @@ jobs:
       - name: Test with pytest
         run: |
           pip install .
-          pytest tests/ -v
+          pytest tests/ -v --cov=rich --cov-report=xml
+      - name: Upload coverge to Codecov
+        uses: codecov/codecov-actions@1
diff --git a/rich/measure.py b/rich/measure.py
index b5b56b54..35af5a0b 100644
--- a/rich/measure.py
+++ b/rich/measure.py
@@ -22,6 +22,11 @@ class Measurement(NamedTuple):
         return self.maximum - self.minimum
 
     def normalize(self) -> "Measurement":
+        """Get measurement that ensures that minimum <= maximum and minimum >= 0
+
+        Returns:
+            Measurement: A normalized measurement.
+        """
         minimum, maximum = self
         minimum = min(max(0, minimum), maximum)
         return Measurement(max(0, minimum), max(0, max(minimum, maximum)))
diff --git a/rich/palette.py b/rich/palette.py
index fa145606..5fb7ff96 100644
--- a/rich/palette.py
+++ b/rich/palette.py
@@ -17,7 +17,14 @@ class Palette:
     # This is somewhat inefficient and needs caching
     @lru_cache(maxsize=1024)
     def match(self, color: Tuple[int, int, int]) -> int:
-        """Find a color from a palette that most closely matches a given color"""
+        """Find a color from a palette that most closely matches a given color.
+
+        Args:
+            color (Tuple[int, int, int]): RGB components in range 0 > 255.
+
+        Returns:
+            int: Index of closes matching color.
+        """
         red1, green1, blue1 = color
         _sqrt = sqrt