Color Palette for Invoice & Billing Tool. Primary: #1E3A5F (on-primary: #FFFFFF). Secondary: #2563EB (on-secondary: #FFFFFF). Accent: #059669 (on-accent: #FFFFFF). Background: #F8FAFC. Foreground: #0F172A. Card: #FFFFFF (card-foreground: #0F172A). Muted: #F1F3F5 (muted-foreground: #64748B). Border: #E4E7EB. Destructive: #DC2626 (on-destructive: #FFFFFF). Ring: #1E3A5F. Notes: Navy professional + paid green.