Color Palette for Healthcare App. Primary: #0891B2 (on-primary: #FFFFFF). Secondary: #22D3EE (on-secondary: #0F172A). Accent: #059669 (on-accent: #FFFFFF). Background: #ECFEFF. Foreground: #164E63. Card: #FFFFFF (card-foreground: #164E63). Muted: #E8F1F6 (muted-foreground: #64748B). Border: #A5F3FC. Destructive: #DC2626 (on-destructive: #FFFFFF). Ring: #0891B2. Notes: Calm cyan + health green.