HTML ASCII Chars (diamond icon) different color than the rest of header text

Just purchased Generate Press Premium. Working on creating a page header but the HTML ASCII Characters (diamond icon) shows up as red color in my GeneratePress header on my mobile phone. On my desktop computer, all the header text is white, including HTML ASCII Characters(diamond icon).

Is there an explanation for this? How can I get the ASCII Characters (diamond icon) to be white on my mobile device also?

Thank you in advance for your help.

Yvonne Musil
ymusil@gmail.com
Payment ID is: 416217