Question about Lenovo Yoga 7 2-in-1

Hello. 1st question: Is the keyboard labelling (on the last picture) white because it is printed like that, or white because the keyboard backlight is switched on? If the backlight is switched on, what does the keyboard look like without the backlight? Is it white or black? I'm looking for a laptop like this, but I need a high contrast because my optic nerve is crushed and I can't see very clearly. 2nd question:;Does this laptop have voice-over function? I have seen another laptop and will ask the same questions on its page. Thank you for your reply. Karin