The iPhone 6 True Tone flash does not have one fixed color temperature per LED in normal use. Instead, the phone uses both LEDs together and adjusts their mix algorithmically to better match the ambient light. Based on the community answer, Apple did not publish a specific Kelvin range for the two LEDs, so there is no confirmed official number for their exact color temperatures or full adjustment range. A commonly cited claim is that it can produce many different color blends, but without precise temperature specs. In practice, that means the flash is designed to approximate surrounding light rather than give you manual control over a defined Kelvin setting. So yes, some unusual light sources could fall outside what it can closely match, but the exact limits are not documented in the provided information.