Vertical split color

[jkinder17]

Hello, I really enjoy this theme but I would like to change the color of the vertical split between windows.

I want to change the white to something to fit the lualine. I have tried tweaking with the theme file, specifically these settings on lines 100-102:

set_hl("WildMenu", { bg = palette.dark_blue, fg = "fg" })
set_hl("Separator", { fg = palette.bg_alt })
set_hl("VertSplit", { bg = "bg", fg = palette.gray })

But I cannot seem to get it working. Any help would be appreciated, thank you.