# COLORTHEME System Variable [GstarCAD 2027](Help%20System/GSTARCAD/2027/Index.md) → [System Variables](Help%20System/GSTARCAD/2027/System%20Variables/(System%20Variables).md) → [C](Help%20System/GSTARCAD/2027/System%20Variables/C/(C).md) ## Function Description: The COLORTHEME system variable is used to control the interface theme color. You can set the ribbon, palette, and other interface elements to different theme colors. | | | | --- | --- | | Type | Integer | | Saved in | Registry | | Initial value | 0 | | Range | 0、1 | ## System Variable Value: **0:** Displays the dark theme **1:** Displays the light theme --- [Original help](https://www.gstarcad.net/help/GstarCAD_2027_en-US/detail/systemVariables_Cgsv/COLORTHEME.html) · © Gstarsoft Co., Ltd.