Ps4 controller usually lights up blue what does it mean when it suddenly lights up pink?

Ps4 controller usually lights up blue what does it mean when it suddenly lights up pink?

You have changed users.

Every user has a color

You have switched users and four of you are logged into the PlayStation at the same time.

User 1: blue

User 2: red

User 3: green

User 4: pink

Either what has already been answered or the game consciously switches this color on

This is also possible if you are standing next to a fire in Tombraider. The lamp flickers, for example red green