Hello vspicata,
It sounds like your display is showing in ‘Grayscale’ even though you have the ‘Color Filters’ feature disabled. Let’s help you get this sorted.
In this scenario, we want to make sure that Grayscale isn’t enabled elsewhere on the device. To do so, go under Settings > Accessibility > Zoom and make sure you don’t have ‘Zoom Filter’ set to Grayscale. If it is, switch it to None or turn Zoom off in order to return color to the display.
To learn more, please visit: Zoom in on the iPhone screen
We hope that helps. Take care.