The color of fiber optic cables and connectors plays a crucial role in identifying the type and characteristics of the fiber. 
Here's a general guide to the colors commonly used in fiber optics:Orange: Orange is often used for multimode fiber optic cables. 
These cables are designed to carry multiple light rays (modes) simultaneously. 
For example, OM1 and OM2 multimodefibers are typically orange.
Beige: Beige connectors are associated with 62.5/125 micron multimode fiber. 
This type of fiber is less common today but may still be found in older installations.
Yellow: Yellow is commonly used for single-mode fiber optic cables. 
Single-mode fibers are designed to carry a single light ray, resulting in higher bandwidth and longer transmissiondistances. 
OS1 and OS2 single-mode fibers are often yellow.
dBlue: Blue connectors can indicate the use ofa regular (PC) polished connector. 
These connectors are commonly used in various types of fiber cables.
Green: Green connectors are often associated with angled physical contact (APC) polished connectors. 
APC connectors are designed to minimize signal reflection, making them suitable for applications where signal loss needs to be minimized, such as in some optical networks.
It's important to note that these color conventions are not universal standards, and variations can exist. 
When working with fiber optic cables and connectors, it's essential to check the documentation or labeling to confirm the specific type and characteristics of the fiber being used.