Dual-Tone and Contrast-Aware 'ggplot2' Geoms R package ggtwotone version 0.1.0 Provides dual-stroke and contrast-aware extensions to 'ggplot2', designed for improved visibility and accessibility in complex visualizations. Includes geoms for dual-stroke segments, regression lines, curved annotations, function plots, paths, and adaptive text. Also includes utility functions for computing contrast-aware color pairs and perceptually distinct highlight palettes using Web Content Accessibility Guidelines (WCAG)-based contrast logic. Software Depends: R (>= 4.1.0), ggplot2 (>= 4.0.3) Imports: colorspace (>= 2.1.2), farver (>= 2.1.2), grDevices (>= 4.5.2), grid (>= 4.5.2), methods (>= 4.5.2), rlang (>= 1.1.7), stats (>= 4.5.2), tidyr (>= 1.3.2), utils (>= 4.5.2) Suggests: dplyr, knitr, rmarkdown, scales, spelling, testthat (>= 3.0.0), vdiffr Beenu Sareena <79365709@nebraska.edu> Comprehensive R Archive Network (CRAN) Beenu Sareena [aut, cre] (ORCID: <https://orcid.org/0009-0002-7611-5499>), Heike Hofmann [aut] (ORCID: <https://orcid.org/0000-0001-6216-5183>) MIT + file LICENSE (https://CRAN.R-project.org/package=ggtwotone/LICENSE) 2026-07-19 application/tgz https://CRAN.R-project.org/package=ggtwotone doi:10.32614/CRAN.package.ggtwotone en-US