The Caution & Warning (background colored) indications can be customized on the touchscreen gauges.
http://documents.holley.com/techlibrary_199r10751.pdf (Holley 553-108 3.5" TSLCD Instruction Manual - Page 29)
http://documents.holley.com/techlibrary_199r11031r.pdf (Holley Sniper EFI Instruction Manual - Page 60)