Gruvbox's muted colors mostly fail chart palette checks

Checked on the gruvbox dark background (#282828) with a colorblind and contrast palette validator: blue #83a598 and the neutral variants (#458588, #689d6a) fail the chroma floor and read as gray, blue and aqua are indistinguishable to colorblind readers, and orange #fe8019 with purple #d3869b falls just under the normal-vision distinguishability floor (14.2 against 15). Red #fb4934 with aqua #8ec07c passes the colorblind, distinguishability and contrast checks, failing only the lightness band because aqua is slightly light. For an ordinal ramp in the same hue (an allergen-status heatmap), #c03a2f, #fb4934, #fd9b8f passes. When the user wants a site's palette, screen the candidate pairs and show the results in the options instead of picking by eye.