Signature Help current argument is difficult to read

[A-UNDERSCORE-D]

Using a standard config, with lazynvim

return {
    {
        "Tsuzat/NeoSolarized.nvim",
        lazy = false, -- make sure we load this during startup if it is your main colorscheme
        priority = 1000, -- make sure to load this before all the other start plugins
        config = function()
            local ns = require("NeoSolarized")
            ns.setup({
                transparent = false,
            })

            vim.cmd([[ colorscheme NeoSolarized ]])
        end,
    },
}

When using signature help from a lsp (nvim-lsp, default configs), the current argument appears to be one of the background colours, and is far too low contrast to be easily read: