I recently purchased two 4K monitors, LG 27UN880-B, and now I have problems with washed out colors on the monitor connected using HDMI, but I'm unsure if it's the USB-C or the HDMI monitor that is actually 'wrong'.
I've seen older posts and reports about washed out colors when connecting a monitor using USB-C because macOS uses YPbPr instead of RGB or something like that. But at least visually, I have the opposite problem with the HDMI looking more washed out.
When I do a black level test, I struggle to see the first 10-12 black levels in a well-lit room on the USB-C monitor and on the HDMI monitor if I set the HDMI black level to 'low'. With HDMI's black level set to 'high' I can clearly see all black levels, but then the colors looks washed out and bland, especially when I compare against the USB-C monitor.
Which of the monitors are likely to be correct? Except for the lacking black levels, the USB-C connected monitor looks much more vibrant and is close to the colors and contrast of the Macbook display.
The OSD setting for black level is greyed out when connected using USB-C and is set to 'low' by default. I found a 'fix_m1_rgb' script, linked below, that is supposed to change the output color format to RGB. But honestly I don't see any difference even after a restart when the USB-C monitor report black level 'high', and the value is also reverted back to 'low' after a while.
black level test: http://www.lagom.nl/lcd-test/black.php
fix_m1_rgb: https://github.com/sudowork/fix_m1_rgb
I've seen older posts and reports about washed out colors when connecting a monitor using USB-C because macOS uses YPbPr instead of RGB or something like that. But at least visually, I have the opposite problem with the HDMI looking more washed out.
When I do a black level test, I struggle to see the first 10-12 black levels in a well-lit room on the USB-C monitor and on the HDMI monitor if I set the HDMI black level to 'low'. With HDMI's black level set to 'high' I can clearly see all black levels, but then the colors looks washed out and bland, especially when I compare against the USB-C monitor.
Which of the monitors are likely to be correct? Except for the lacking black levels, the USB-C connected monitor looks much more vibrant and is close to the colors and contrast of the Macbook display.
The OSD setting for black level is greyed out when connected using USB-C and is set to 'low' by default. I found a 'fix_m1_rgb' script, linked below, that is supposed to change the output color format to RGB. But honestly I don't see any difference even after a restart when the USB-C monitor report black level 'high', and the value is also reverted back to 'low' after a while.
black level test: http://www.lagom.nl/lcd-test/black.php
fix_m1_rgb: https://github.com/sudowork/fix_m1_rgb