quartomonothemer

This package provides custom Quarto Revealjs, ggplot2, and gt themes. This work is strongly influenced by xaringanthemer, but supports only limited features.

You can find more examples here

Installation

You can install the development version of quartomonothemer from R-universe with:

install.packages("quartomonothemer", repos = "https://kazuyanagimoto.r-universe.dev")

Example

First, add custom.scss file to the YAML header.

format:
  revealjs:
    theme: custom.scss

Then, run style_mono_quarto() inside of the slide qmd file. It produces the quartomonothemer.scss

library(quartomonothemer)
library(showtext)

font_title <- "Josefin Sans"
font_text <- "Montserrat"
font_sans <- "Noto Sans" 
color_base <- "#009F8C"
color_base_light <- "#95DFD6"
color_accent <- "#B75C9D"
color_accent_light <- "#DBA6CC"
gray <- "#bebebe"
darkgray <- "#6d6d6d"

font_add_google(font_title)
font_add_google(font_text)
showtext_auto()

style_mono_quarto(
  font_title = font_title,
  font_text = font_text,
  font_sans = font_sans,
  color_base = color_base,
  color_accent = color_accent,
  color_link = color_accent,
  color_code = color_base,
  size_base = 30,
  path_scss = "quartomonothemer.scss"
)

This package also provide theme_quarto() based on the title and text fonts,

library(palmerpenguins)
library(tidyverse)
penguins |>
  ggplot(aes(x = flipper_length_mm, y = bill_length_mm,
             color = species, shape = species)) +
  geom_point(size = 3) +
  scale_color_manual(values = c(color_base, color_base_light, darkgray)) +
  labs(x = "Flipper Length (mm)", y = "Bill Length (mm)") +
  theme_quarto() +
  theme(legend.position = c(0.9, 0.1))

and gt_theme_quarto() as a gt theme!

library(gt)
penguins |>
  filter(!is.na(sex)) |>
  group_by(species, sex) |>
  summarize(bill_length = mean(bill_length_mm, na.rm = TRUE),
            .groups = "drop") |>
  pivot_wider(names_from = "sex", values_from = "bill_length",
              names_prefix = "bill_length_") |>
  mutate(ratio_bar = 100 * bill_length_female / bill_length_male,
         ratio = ratio_bar / 100) |>
  gt(rowname_col = "species") |>
  cols_label(bill_length_female = "Female", bill_length_male = "Male",
             ratio_bar = "Female/Male", ratio = "Pct.") |>
  fmt_number(columns = starts_with("bill_length"), decimals = 1) |>
  fmt_percent(ratio, decimals = 0) |>
  gt_plt_bar_pct(ratio_bar, fill = color_base, scaled = TRUE) |>
  gt_theme_quarto()

Note that it does not provide any color maps. You need to specify by scale_*_manual()