# INTERFERECOLOR System Variable [GstarCAD 2019](Help%20System/GSTARCAD/2019/Index.md) → [System Variables](Help%20System/GSTARCAD/2019/System%20Variables/(System%20Variables).md) → [I](Help%20System/GSTARCAD/2019/System%20Variables/I/(I).md) ## Function Description: The INTERFERECOLOR system variable is used to control the color of interference objects. | | | | --- | --- | | Type | Strings | | Saved in | Drawing | | Initial value | 1 | The valid value could be "BYLAYER", "BYBLOCK", color name, and an integer from 0 to 255\. The valid value of true color is an integer strings with a RGB in front. Each integer is separated by a comma. It is input in the following way: RGB:000,000,000 . --- ## Other versions with matching text [GstarCAD 2016](../../../2016/System%20Variables/I/INTERFERECOLOR%20System%20Variable.md) · [GstarCAD 2017](Help%20System/GSTARCAD/2017/System%20Variables/I/INTERFERECOLOR%20System%20Variable.md) · [GstarCAD 2018](Help%20System/GSTARCAD/2018/System%20Variables/I/INTERFERECOLOR%20System%20Variable.md) · [GstarCAD 2020](Help%20System/GSTARCAD/2020/System%20Variables/I/INTERFERECOLOR%20System%20Variable.md) · [GstarCAD 2021](Help%20System/GSTARCAD/2021/System%20Variables/I/INTERFERECOLOR%20System%20Variable.md)