pub fn theme_gray_base(base_size: f64) -> ThemeExpand description
Classic ggplot2 gray theme with custom base font size.
Matches ggplot2’s theme_grey() defaults:
- Black text, grey30 axis text, grey20 ticks
- Grey92 panel background with white gridlines
- Axis lines blank (panel defined by background, not lines)
- Grey85 strip background, grey10 strip text