Font Color in Contact Poster Not Displaying on Recipient’s iPhone

What's displayed on other's devices is based on what they've saved in their contact list, not what you've specifically shared through Message settings.

When you utilize the Photo Sharing feature within the Message app, the recipient can save that photo and associate it with your contact information. Unfortunately, this isn't something you can modify or control once it's stored on their end.

Nevertheless, you retain the power to discontinue sharing your photos through messages at any moment. This allows you to manage the ongoing distribution of your images through that particular channel.

However, you can stop sharing your Photos through messages anytime.

Please see the pic below which is self-explanatory.

Start Sharing:

Stop Sharing

I think it's a glitch and it's really frustrating as I have tried several times but the contact font color changes to white during incoming/outgoing calls. I hope they bring a fix to this.