The color of text on my friend's signs are different than mine (faded)

My friend and I both use the exact same texture pack, we don't have anything else downloaded, not even optifine or anything like that

 

My signs look like this: https://i.imgur.com/uZeaKdU.png

And hers look like this: https://i.imgur.com/YKe31bI.png

 

As you can see they are completely different, hers are more faded than mine. I have no idea why. We have the exact same texture pack (the most recent update too).

 

I have tried placing the signs in different places (east west, north south) but it makes NO difference whatsoever.

I have tried changing the video settings, every possible setting. Also no difference.

Please help!