Original Color of Chocobos

I was checking up the item "Han Lemon" on the market and got the idea that every chocobo had a secondary color that is their Original Color.

When you get your chocobo companion, the companion menu will read: "Main color - Desert Yellow, Secondary Color - ???" in the color area of the companion menu
The secondary color is hidden until you use the "Han Lemon" as it restores the feathers of your chocobo to their original hue.

This color would be random for every chocobo and would be chosen when using a "Han Lemon" for the first time. The color would also be unable to be changed as it is the origianl hue of their feathers.
This color would function as highlights in your chocobos feathers. They way it works now, the tip of their wings and tail feathers are just darker. With this they would be the original color.

I feel this would make every chocobo in the game a bit more unique and it would be fun to see how people would create amazing color combinations of their chocobos.