# GFCLR1 System Variable [GstarCAD 2026](Help%20System/GSTARCAD/2026/Index.md) → [System Variables](Help%20System/GSTARCAD/2026/System%20Variables/(System%20Variables).md) → [G](Help%20System/GSTARCAD/2026/System%20Variables/G/(G).md) ## Function Description: The GFCLR1 system variable is used to specify the color for a one-color gradient fill or the first color for a two-color gradient fill. | | | | --- | --- | | Type | Strings | | Saved in | Not saved | | Initial value | 5 | **Valid value including:** **Index Color:** an integer between 1 and 255, or color name of the front seven colors **True Color:** a RGB or HSL value between 000 and 255, the format is "RGB:000,000,000" **Color Books:** standard color system, wizard, and set text --- [Original help](https://www.gstarcad.net/help/GstarCAD_2026_en-US/detail/systemVariables_Ggsv/GFCLR1.html) · © Gstarsoft Co., Ltd.