Gfx Boot Customizer 1.0.0.6 285 Here

It is a portable executable. It does not install background services, drivers, or telemetry. This reduces the risk of anti-cheat software (like EAC or BattlEye) flagging the system for kernel-level modifications.

GFX Boot Customizer is a Windows-based utility designed to modify the graphical user interface (GUI) of the GRUB (Grand Unified Bootloader) and GFXBoot systems. Version 1.0.0.6 build 285 represents one of the later stable releases of the tool, providing users the ability to unpack, edit, and repack boot loader files (message files) without requiring command-line interaction. This paper outlines the technical function, use cases, and limitations of the software. gfx boot customizer 1.0.0.6 285

Cause: Background too bright or dark.
Fix: Add a semi-transparent overlay (e.g., 50% black rectangle behind text area) to your image, then reapply. It is a portable executable