iPhone 6 with iOS 11.4.1 grayscale only no color
Turned on iPhone today. All screens gray. No color. I went to Settings, General & Accessibility. Under VISION, the choices are VoiceOver, Zoom, Magnifier and Display Accommodations (no Grayscale). Display Accommodations has choices Invert Colors (Smart Invert & Classic Invert) & Color Filters (Grayscale, Red/Green Filter, Green/Red Filter, Blue/Yellow Filter, Color Tint). No matter how I change the choices, the color does not return.