Black text under iPhone icons

Hey Guys,

The text under the icons on my iPhone 8+ running IOS 13.2 Beta is black and it’s really hard to read. Looking at homescreen photos online I see people with white text under their icons.

Does anyone know how to change this? I’ve tried Google but not had a lot of luck.

Note: I normally use Dark mode but even after changing to light mode the icon text is still black

Note 2: This was using a solid purple background (#CC8899 for those that understand hex) changing to solid black switched the icon text colour to white. Is the change always automatic or can it be controlled manually?