STRUCTURE Blue is a construction management system that combines accounting, project management, and service management in a single package. It is designed for specialty service contractors and is a good fit for midsize contractors with 20 to 500 employees or those that generate between $5 and $100 million in revenue annually. The accounting module is feature-rich and includes many construction-specific features such as AIA billing, time and materials billing, equipment tracking, prevailing wage reports, insurance certificates, and more.