viridis

      set palette viridis

The "viridis" palette is a (blue->yellow) gradient designed to accommodate users with impaired color vision. Viridis was developed by Stéfan van der Walt and Nathaniel Smith. It features an approximately linear gradient of perceived brightness (luminance). The colormap version used in gnuplot is based on

      "Viridis - Colorblind-Friendly Color Maps for R", Garnier et al (2021)
      https://CRAN.R-project.org/package=viridis