button · sample · Haiku 4.5 · trial 045 of 100

What the model said

I'd suggest **#0066CC** (a classic blue) for a primary action button. It's:
- Recognizable and trustworthy
- Accessible with good contrast on light backgrounds
- Versatile across different design styles

If you want alternatives:
- **#22C55E** (green) for positive/success actions
- **#EF4444** (red) for destructive/warning actions
- **#6366F1** (indigo) for a more modern feel

What's the button's purpose? That can help narrow it down.