IOS colors don't match desktop colors

My app looks very different when I run it on IOS than when I run it in the Unity editor. Colors on different objects with different shaders can match perfectly in the Game view but be very different on IOS. This is very annoying. Have others encountered this problem? How do others deal with it?

Is there a way to make colors in the Game view look much closer to those I see on IOS?

Alternatively, is there a way to interactively change colors and light values and see the impact in real-time on IOS?

Right now, I'm embedding Slider objects into my app and writing custom code that dynamically updates colors based on these Slider values. My custom code debug logs the values of the sliders whenever they change. I manually adjust the sliders on my iPhone until I like the colors I see, read the RGB values out of the debug console in XCode, then manually enter these values into Unity. (This last step typically requires creating the color in Photoshop and then eyedropper'ing it into the proper field in Unity.) This method works, but it's really awkward, error-prone, and quite time consuming.