Hi Luximage you are right The reddish color was due
to the HDRi temperature color default 6500k.
With a simple white color multiplier everything is
normal.
You can use Krita or Affinity photo to achieve the proper color space that is utility srgb texture you choose in cycles. In Krita open a jpg texture, to setup aces from the menu bar go to settings/dockers/lut management, then in the lut management window check use opencolorIO, in the color engine c...
In addition to what PetrT said.
If it happen that the colorspace of the texture is not correctly set you end with wrong color output as you can see in my first post with the wrong floor and hdri input color space.
But this is corner case as most image respect what PetrT said.