Can anybody help me? My iOS game have a poor contrast in the iphone, in the mac colors are more vivid, more colorful

Can anybody help me? I need help, in my mobile phone the game have a poor contrast, I don't know cause it, I'm using unity 5, last version, and mobile is an iPhone 5s, the colors in the project are good, in the mac is good, something success later to export, or in Xcode. thanks.