Integrate default color into personalized theme ggplot

I created my own theme and now I also want to standardize the color set that is used. I tried to do this with the list solution, provided in the answer of Viktor in this feed:

Associate a color palette with ggplot2 theme

df <- mtcars
uwvPalet <- c("#0078D2","#003282","#C4D600")
theme_uwv <- function(base_size = 22, base_family = "Verdana"){theme_hc(base_size = base_size, base_family = base_family)%+replace%theme(plot.title = element_text(color = rgb(0, 120, 210)), complete = TRUE)}
theme_uwv2 <- list(theme_uwv, scale_color_manual(values = uwvPalet))
ggplot(df, aes(fill = cyl, x = am, y = mpg)) + geom_bar(position = "dodge", stat="identity") + theme_uwv2()

Unfortunately, I get the error:

Error in theme_uwv2() : could not find function "theme_uwv2"

Anyone know how I can fix this?

The following worked for me. theme_uwv2 needed the value returned from theme_uwv() as a list element, not the function itself. Also, you were making a plot where the fill was the dominant colour variable, so I've substituted scale_color_manual() with scale_fill_manual() for demonstration purposes.

library(ggplot2)
library(ggthemes)

df <- mtcars
uwvPalet <- c("#0078D2","#003282","#C4D600")
theme_uwv <- function(base_size = 22, base_family = "Verdana"){
  theme_hc(base_size = base_size, base_family = base_family) %+replace% 
    theme(plot.title = element_text(color = rgb(0, 120, 210, maxColorValue = 255)), 
          complete = TRUE)}
theme_uwv2 <- list(theme_uwv(), scale_fill_manual(values = uwvPalet))

ggplot(df, aes(fill = as.factor(cyl), x = am, y = mpg)) + 
  geom_col(position = "dodge") + 
  ggtitle("test") +
  theme_uwv2