Color Palette for Architecture / Interior. Primary: #171717 (on-primary: #FFFFFF). Secondary: #404040 (on-secondary: #FFFFFF). Accent: #A16207 (on-accent: #FFFFFF). Background: #FFFFFF. Foreground: #171717. Card: #FFFFFF (card-foreground: #171717). Muted: #E8ECF0 (muted-foreground: #64748B). Border: #E5E5E5. Destructive: #DC2626 (on-destructive: #FFFFFF). Ring: #171717. Notes: Minimal black + accent gold [Accent adjusted from #D4AF37 for WCAG 3:1].