Update docstring of land and water gallery example
@@ -5,8 +5,8 @@ Color land and water
The ``land`` and ``water`` parameters of :meth:`pygmt.Figure.coast` specify
a color to fill in the land and water masses, respectively. There are many
:gmt-docs:`color codes in GMT <gmtcolors.html>`, including standard GMT color
-names (like ``skyblue``), R/G/B levels (like ``0/0/255``), a hex value (like
-``#333333``), and a graylevel (like ``50``).
+names (like ``"skyblue"``), R/G/B levels (like ``"0/0/255"``), a hex value
+(like ``"#333333"``), and a gray level (like ``"gray50"``).
"""
import pygmt
