What does it mean when my battery line is yellow on a 6s Plus?

[wpa2000]

What does it mean when my battery line is yellow on a 6s Plus?

[Salisbury]

    wpa2000, on the iPhone 6s Plus I have the battery line will turn to Red when the battery level reaches 20% or less just to indicate the battery is getting low. Perhaps yours shows up in Yellow, or we're color blind

[SuzyQ · Accepted solution]

If you are using Low Power mode, the indicator will show yellow, according to this discussion:

Why is my battery indicator yellow now instead ... | Apple Support Communities

[Salisbury]

    SuzyQ, good pick up you are correct. Had never used the Low Mode but just tested the preference in the 6s+ settings and it will turn the battery indicator to yellow. So the red color is just to indicate when the battery goes to 20% and lower.