Colors
Primary = main brand color. Accent = highlights & calls-to-action.
Text on primary/accent surfaces picks "text on dark" or "text on light" automatically — whichever reads better on that color.
Shape & Feel
10px
0 = sharp/technical · high = soft/friendly
The page background color (in Colors above) defines the whole brand world — make it dark or light and text, cards and the logo variant adapt automatically.