Hi @zayno70

To change the font color of welcome, hotelname and tag line, you need to do changes in the file at below path.
hotelcommerce/modules/hotelreservationsystem/views/css/HotelReservationFront.css - line:20.

Also, you may need to change the user info font color(https://prnt.sc/svpetq). For this, you need to do changes in file at below path.
You will need to change color property for the following elements.
#user_info_acc {} -> LINE:1
#user_info_acc span.caret {} -> LINE:26
.header_user_info a {} -> LINE:36