Change in all app colors

You may accidentally set the Color Filters option set to ON.

Double check the following: Open Settings ➔ Accessibility ➔ Display & Text Size: Ensure that Smart Invert, Classic Invert and Color Filters are set to OFF.

Axel F.

Treacy22 Said:

"Change in all app colors: All my apps are weird colors the wallpaper was changed (not by me) all my photos look like negatives i took some pictures turned off my phone when I turned it back on everything is all screwed up"

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Two things...

A. Try Using Warmer Colors:

To do so, Use Night Shift on your iPhone, iPad, and iPod touch - Apple Support

and...

B. Reset the Home Screen Layout...

Everything will show up a default, including (i.e. Contacts). You'll have to make note of what is on each Home Screen, prior to resetting it.

Go Here: Move and organize apps on iPhone - Apple Support

Scroll to: Reset the Home Screen and Apps to their Original Layout

1. Go to: Settings
2. Tap: General
3. Tap: Reset
4. Tap: Reset Home Screen Layout