Why is the background color in Photoshop dimmer than the original color?

Question

PNG

The situation is as follows, I create .psd with the following parameters:
1) ColorMode RGB/32 bit. Color Profile: sRGB IEC61966-2.1
The image has this background color (255, 127, 127), but Photoshop renders it as slightly lighter.

Why is this happening? when saving the image as a png file, it has the correct color (brightness is normal)
Perhaps this is due to gamma adjustment, but I'm not sure, otherwise why is it not spelled out when creating the document? Where can you see this value?

Answer 1

/32bit. :) why not 64? joke