Blue is a lifestyle application developed by Oak Studios LLC for iPhone users. It provides a fast and colorful interface to visualize your 7-day weather forecast. With a unique visual gradient, Blue allows you to swipe up and see hourly weather represented by color, making it easy to recognize weather patterns and plan your day accordingly.

The hourly colors in Blue are calculated based on various metrics such as temperature, humidity, and sunrise/sunset times for your current location. Each color represents a different weather condition. For example, blue indicates a cold winter day, while purple signifies extremely cold temperatures. Green represents a cool feeling, yellow indicates room temperature, orange signifies a warm feeling, red represents a hot summer day, and pink indicates extremely hot weather.

Blue also allows you to view temperatures in either Fahrenheit or Celsius, depending on your iOS region settings. It automatically adjusts the unit based on your selected country/region.

Please note that Blue is designed to show weather for your current physical location and does not provide an option to manually change your location within the app.