In Studio Pro, the activities, connect db, edit connection string window contains white background with light grey or light white text.
It is not easy to read the text.
Hi @wasay
It is a known bug. I’ve attached this topic to our internal ticket and I will update it when it is fixed.
The issue has been addressed internally and will be fixed in one of the future releases of the Database activity package 
Anil_G
ashokkarale
jinal.shah
Gautham_Pattabiraman
postwick
chandreshsinh.jadeja
vrdabberu
Ajay_Mishra
sven.wullum1
Vyshnavi_Nalumachu