diff --git a/man/cell_spec.Rd b/man/cell_spec.Rd
index cf6e298..291a18a 100644
--- a/man/cell_spec.Rd
+++ b/man/cell_spec.Rd
@@ -6,7 +6,7 @@
 \usage{
 cell_spec(x, format, bold = F, italic = F, monospace = F, color = NULL,
   background = NULL, align = NULL, font_size = NULL, angle = NULL,
-  hover_message = NULL)
+  hover_message = NULL, background_as_tile = TRUE)
 }
 \arguments{
 \item{x}{Things to be formated. It could be a vector of numbers or strings.}
@@ -40,6 +40,9 @@
 
 \item{hover_message}{A vector of strings to be displayed as hover message.
 Of course, this feature is nly available in HTML.}
+
+\item{background_as_tile}{T/F value indicating if you want to have round
+cornered tile as background.}
 }
 \description{
 Specify Cell format before it gets into kable
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.}
diff --git a/man/spec_color.Rd b/man/spec_color.Rd
index 5a106f2..ab25980 100644
--- a/man/spec_color.Rd
+++ b/man/spec_color.Rd
@@ -5,7 +5,7 @@
 \title{Generate viridis Color code for continuous values}
 \usage{
 spec_color(x, alpha = 1, begin = 0, end = 1, direction = 1,
-  option = "D", na_color = "#FFBBBBBB")
+  option = "D", na_color = "#BBBBBB")
 }
 \arguments{
 \item{x}{continuous vectors of values}