# INTERFERECOLOR System Variable [GstarCAD 2026](Help%20System/GSTARCAD/2026/Index.md) → [System Variables](Help%20System/GSTARCAD/2026/System%20Variables/(System%20Variables).md) → [I](Help%20System/GSTARCAD/2026/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 can 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. --- [Original help](https://www.gstarcad.net/help/GstarCAD_2026_en-US/detail/systemVariables/INTERFERECOLOR.html) · © Gstarsoft Co., Ltd.