Text Colors are incorrect

The bug

The text color in game is incorrect.

Steps to Reproduce:

1. Run command:

/tellraw @a {"text":"TEST TEXT","color":"#FFFFFF"} 

2. Extract the color of “TEST TEXT”

Observed Behavior:

The text color is #FCFCFC (252,252,252).

Expected Behavior:

The text color is #FFFFFF (255,255,255).