diff --git a/NAMESPACE b/NAMESPACE
index 2fd3882..86effab 100644
--- a/NAMESPACE
+++ b/NAMESPACE
@@ -8,15 +8,6 @@ export(chart_theme)
 export(combine_charts)
 export(f_aes)
 export(ggarrange)
-export(scale_color_continuous)
-export(scale_color_viridis_c)
-export(scale_color_viridis_d)
-export(scale_colour_continuous)
-export(scale_colour_viridis_c)
-export(scale_colour_viridis_d)
-export(scale_fill_continuous)
-export(scale_fill_viridis_c)
-export(scale_fill_viridis_d)
 export(theme_sciviews)
 export(theme_sciviews_graphics)
 export(theme_sciviews_lattice)
@@ -42,6 +33,7 @@ importFrom(rlang,abort)
 importFrom(rlang,f_env)
 importFrom(rlang,f_lhs)
 importFrom(rlang,f_rhs)
+importFrom(rlang,is_quosure)
 importFrom(rlang,is_true)
 importFrom(rlang,warn)
 importFrom(scales,gradient_n_pal)
diff --git a/R/chart-package.R b/R/chart-package.R
index 304beb1..c3d5f8f 100644
--- a/R/chart-package.R
+++ b/R/chart-package.R
@@ -20,7 +20,7 @@
 #' @importFrom viridis viridis_pal
 #' @importFrom scales hue_pal gradient_n_pal
 #' @importFrom cowplot theme_cowplot
-#' @importFrom rlang abort warn f_env f_lhs f_rhs is_true
+#' @importFrom rlang abort warn f_env f_lhs f_rhs is_true is_quosure
 #' @importFrom stats as.formula asOneSidedFormula
 #' @importFrom utils modifyList
 #' @importFrom pryr modify_lang
diff --git a/man/viridis.Rd b/man/viridis.Rd
deleted file mode 100644
index 218c690..0000000
--- a/man/viridis.Rd
+++ /dev/null
@@ -1,118 +0,0 @@
-% Generated by roxygen2: do not edit by hand
-% Please edit documentation in R/chart_theme.R
-\name{viridis}
-\alias{viridis}
-\alias{scale_colour_viridis_c}
-\alias{scale_color_viridis_c}
-\alias{scale_colour_viridis_d}
-\alias{scale_color_viridis_d}
-\alias{scale_fill_viridis_c}
-\alias{scale_fill_viridis_d}
-\alias{scale_colour_continuous}
-\alias{scale_color_continuous}
-\alias{scale_fill_continuous}
-\title{Viridis color scales}
-\usage{
-scale_colour_viridis_c(..., alpha = 1, begin = 0, end = 1,
-  direction = 1, option = "D", values = NULL, space = "Lab",
-  na.value = "grey50", guide = "colourbar", aesthetics = "colour")
-
-scale_color_viridis_c(..., alpha = 1, begin = 0, end = 1,
-  direction = 1, option = "D", values = NULL, space = "Lab",
-  na.value = "grey50", guide = "colourbar", aesthetics = "colour")
-
-scale_colour_viridis_d(..., alpha = 1, begin = 0, end = 1,
-  direction = 1, option = "D", aesthetics = "colour")
-
-scale_color_viridis_d(..., alpha = 1, begin = 0, end = 1,
-  direction = 1, option = "D", aesthetics = "colour")
-
-scale_fill_viridis_c(..., alpha = 1, begin = 0, end = 1,
-  direction = 1, option = "D", values = NULL, space = "Lab",
-  na.value = "grey50", guide = "colourbar", aesthetics = "fill")
-
-scale_fill_viridis_d(..., alpha = 1, begin = 0, end = 1,
-  direction = 1, option = "D", aesthetics = "fill")
-
-scale_colour_continuous(...,
-  type = getOption("ggplot2.continuous.colour", default = "gradient"))
-
-scale_color_continuous(..., type = getOption("ggplot2.continuous.colour",
-  default = "gradient"))
-
-scale_fill_continuous(..., type = getOption("ggplot2.continuous.fill",
-  default = "gradient"))
-}
-\arguments{
-\item{...}{Other arguments passed on to \code{\link[=discrete_scale]{discrete_scale()}} or
-\code{\link[=continuous_scale]{continuous_scale()}} to control name, limits, breaks, labels and so forth.}
-
-\item{alpha}{The alpha transparency, a number in \code{[0,1]}, see argument alpha
-in hsv.}
-
-\item{begin}{The (corrected) hue in \code{[0,1]} at which the viridis colormap
-begins.}
-
-\item{end}{The (corrected) hue in \code{[0,1]} at which the viridis colormap ends.}
-
-\item{direction}{Sets the order of colors in the scale. If \code{1}, the default,
-colors are ordered from darkest to lightest. If \code{-1}, the order of colors is
-reversed.}
-
-\item{option}{A character string indicating the colormap option to use. Four
-options are available: \code{"magma"} (or \code{"A"}), \code{"inferno"} (or \code{"B"}),
-\code{"plasma"} (or \code{"C"}), \code{"viridis"} (or \code{"D"}, the default option) and
-\code{"cividis"} (or \code{"E"}).}
-
-\item{values}{If colours should not be evenly positioned along the gradient
-this vector gives the position (between 0 and 1) for each colour in the
-colours vector. See rescale() in the scales package for a convience function
-to map an arbitrary range to between 0 and 1.}
-
-\item{space}{Colour space in which to calculate gradient. Must be "Lab" -
-other values are deprecated.}
-
-\item{na.value}{Missing values will be replaced with this value.}
-
-\item{guide}{A function used to create a guide or its name. See \code{\link[=guides]{guides()}}
-for more info.}
-
-\item{aesthetics}{Character string or vector of character strings listing the
-name(s) of the aesthetic(s) that this scale works with. This can be useful,
-for example, to apply colour settings to the colour and fill aesthetics at
-the same time, via \code{aesthetics = c("colour", "fill")}.}
-
-\item{type}{One of "gradient" or "viridis" indicating the colour scale to
-use. Can be changed with \code{\link[=options]{options()}}, and the chart package set it to
-\code{"viridis"} in case it is not set yet when the package is attached.}
-}
-\description{
-ggplot2 version 3 add these function to include viridis color scales. These
-functions are cloned from ggplot2 v.3.0.0 in order to use the same color
-scheme with earlier versions of ggplot2. Note, however, that the options
-\code{ggplot2.continuous.fill} and \code{gplot2.continuous.colour} are set to
-\code{"viridis"} if not already specified. This changes the default for continuous
-colors in favor of viridis for both \code{ggplot()} and \code{chart()}.
-}
-\examples{
-geyser <- data.io::read("geyser", package = "MASS")
-chart(data = geyser, waiting ~ duration) +
-  xlim(0.5, 6) + ylim(40, 110) +
-  stat_density2d(aes(fill = ..level..), geom = "polygon") +
-  theme(panel.grid = element_blank()) -> gg
-
-combine_charts(
-  list(
-    gg + scale_fill_viridis_c(option = "A") + labs(x = "A = magma", y = NULL),
-    gg + scale_fill_viridis_c(option = "B") + labs(x = "B = inferno", y = NULL),
-    gg + scale_fill_viridis_c(option = "C") + labs(x = "C = plasma", y = NULL),
-    gg + scale_fill_viridis_c(option = "D") + labs(x = "D  = viridis", y = NULL),
-    gg + scale_fill_viridis_c(option = "E") + labs(x = "E = cividis", y = NULL)
-  ), ncol = 3, nrow = 2
-)
-}
-\seealso{
-\code{\link[=chart]{chart()}}, \code{\link[=chart_theme]{chart_theme()}}
-}
-\concept{Viridis colors}
-\keyword{color}