improve color code setting
diff --git a/man/row_spec.Rd b/man/row_spec.Rd
index 3b1e24a..ef7712c 100644
--- a/man/row_spec.Rd
+++ b/man/row_spec.Rd
@@ -23,8 +23,8 @@
\item{monospace}{A T/F value to control whether the text of the selected column
need to be monospaced (verbatim)}
-\item{color}{A character string for row text color. Here please pay
-attention to the differences in color codes between HTML and LaTeX.}
+\item{color}{A character string for row text color. For example, "red" or
+"#BBBBBB".}
\item{background}{A character string for row background color. Here please
pay attention to the differences in color codes between HTML and LaTeX.}