On this website, the blue button has the defined color
#1E9AE2. In Safari and Firefox on macOS, this color is displayed as
In this screenshot, Safari is on the left, and Chrome to the right.
If I switch the following setting to "sRGB IEC61966-2.1", Safari and Firefox display it like the others too:
What's the reason for this difference?
Do all macOS computers have this setting as a default?