| Acronym | Definition |
|---|
| RGB | Red-Green-Blue (color model based on additive color primaries) |
| RGB | Rent Guidelines Board (New York) |
| RGB | Reconnaissance General Bureau (North Korea) |
| RGB | Red Green Blue |
| RGB | Robust Graphics Booster |
| RGB | Returnable Glass Bottle (packaging) |
| RGB | Red Giant Branch (astronomy) |
| RGB | Rec.Games.Backgammon (user group) |
| RGB | Roberto Gómez Bolaños (Mexican actor) |
| RGB | Regional Governing Body (various organizations) |
| RGB | Reduction Gear Box |
| RGB | Residential Green Building |
| RGB | Raw Ground Beef (food inspection) |
| RGB | Robinson Green Beretta Corporation (Providence, RI) |
| RGB | Regional General Board |
| RGB | Rusty Grain Beetle |
| RGB | Rail Garrison Basing |