button · sample · Haiku 4.5 · trial 048 of 100

What the model said

I'd recommend **#0066CC** for a primary button color. It's a vibrant, accessible blue that works well on most backgrounds and is familiar to users from common web interfaces. 

If you want alternatives:
- **#28A745** for success/positive actions (green)
- **#DC3545** for destructive/warning actions (red)
- **#6C757D** for secondary buttons (gray)

Let me know if you'd like me to adjust based on your design needs (darker, lighter, different tone, etc.).