via Rakuten Shopping offers the Urban Armor Gear 4.7" Case for iPhone 6 in Slate (pictured) or Rust for $19.65 with free shipping. That's the lowest total price we could find in any color by $10. It features an HD screen protector and an impact-resistant soft core, and it purportedly meets military drop-test standards.

Of note, it's also available in White or Plasma for $19.88 with free shipping.