Dark surfaces (primary canvas)

--bg-0#07091A

--bg-1#0B1027

--bg-2#131938

--bg-3#1B2247

--bg-4#242C57

Foreground on dark

--fg-1#F5F6FB

--fg-2#B8BDD6

--fg-3#6F7798

--fg-4#4A5172