a_plex_theme: All of the themes follow a similar pattern mainly just...
In awhstin/awtools: awtools: misc tools and themes for austinwehrwein.com

The main two are a_plex_theme / a_dark_theme which is a dark version of a_plex_theme

a_plex_theme(base_family = "IBM Plex Sans", base_size = 9,
  plot_title_family = "IBM Plex Mono", plot_title_size = 20,
  plot_title_face = "bold", subtitle_family = base_family,
  subtitle_size = 10, subtitle_face = "plain",
  strip_text_family = base_family, strip_text_size = 10,
  strip_text_face = "plain", caption_family = base_family,
  caption_size = 9, caption_face = "plain",
  axis_text_size = base_size, axis_title_family = plot_title_family,
  axis_title_size = 10, axis_title_face = "plain",
  grid_col = "#dedede", grid = TRUE, noaxis = FALSE,
  emphasis = "xy", rotate_x = FALSE)

`base_family, base_size`	base font family and size
`plot_title_family, plot_title_face, plot_title_size`	plot title family, face, size
`subtitle_family, subtitle_face, subtitle_size`	plot subtitle family, face and size
`strip_text_family, strip_text_face, strip_text_size`	facet label font family, face and size
`caption_family, caption_face, caption_size`	plot caption family, face, size
`axis_title_family, axis_title_face, axis_title_size`	axis title font family, face and size
`grid_col, axis_col`	grid & axis colors; both default to `#cccccc`
`grid`	panel grid (`TRUE`, `FALSE`, or a combination of `X`, `x`, `Y`, `y`)
`noaxis`	include/exclude axis (`TRUE`, `FALSE`, or a combination of `X`, `x`, `Y`, `y`)
`emphasis`	bold one axis title of both (a combination of 'x','y' or 'xy')
`rotate_x`	TRUE/FAlSE to rotate axis text