diff --git a/pythonetc/README.md b/pythonetc/README.md
index 32734f8..378cb3e 100644
--- a/pythonetc/README.md
+++ b/pythonetc/README.md
@@ -31,6 +31,7 @@ More:
 1. ./dunder.md
 1. ./magic.md
 1. ./assert.md
+1. ./colorsys.md
 1. ./snippets/final.md
 1. ./snippets/getitem.md
 1. ./license.md
diff --git a/pythonetc/colorsys.md b/pythonetc/colorsys.md
new file mode 100644
index 0000000..2c2a669
--- /dev/null
+++ b/pythonetc/colorsys.md
@@ -0,0 +1,7 @@
+The [colorsys](https://docs.python.org/3/library/colorsys.html) module converts colors between different [representations](https://en.wikipedia.org/wiki/Color_model): RGB, YIQ, HLS, and HSV. Yes, it is in the stdlib!
+
+```python
+import colorsys
+colorsys.rgb_to_hsv(0.2, 0.4, 0.4)
+# (0.5, 0.5, 0.4)
+```