UI Image color appear grey, even tho the selected color is white

As the title imply.
When we add an Image to a Canvas, the 100X100 generated Square will appear grey instead of white.
However, Text Mesh Pro color will appear correctly white.
I believe it is just a color setup issue from Unity.

Tested in
Unity 6000.0.27
URP

Along with that Fix, it would be great if we could have an HDR color picker instead of the current LDR one.