--- /dev/null
+# Stubs for colorsys\r
+\r
+from typing import Tuple\r
+\r
+def rgb_to_yiq(r: float, g: float, b: float) -> Tuple[float, float, float]: ...\r
+def yiq_to_rgb(y: float, i: float, q: float) -> Tuple[float, float, float]: ...\r
+def rgb_to_hls(r: float, g: float, b: float) -> Tuple[float, float, float]: ...\r
+def hls_to_rgb(h: float, l: float, s: float) -> Tuple[float, float, float]: ...\r
+def rgb_to_hsv(r: float, g: float, b: float) -> Tuple[float, float, float]: ...\r
+def hsv_to_rgb(h: float, s: float, v: float) -> Tuple[float, float, float]: ...\r
+\r
+# TODO undocumented\r
+ONE_SIXTH = ... # type: float\r
+ONE_THIRD = ... # type: float\r
+TWO_THIRD = ... # type: float\r