Washed out external monitor on M1 Mac mini on usb c

I too have had this issue since I bought my M1 Mac Mini 10 months ago - I've put up with the issue because it tends to be quite intermittent. I have two 4k displays hooked up (BENQ EL2870U's), one via DisplayPort and the other HDMI. My main display hooked up via DP 'shimmers' and I get very fine vertical bars down the screen. I've replaced the DP cable and swapped back to HDMI with no effect. If I move windows around, it causes the shimmer to fade or get worse. It does tend to stop on its own and everything is fine. I've also tried adjusting resolution, change the refresh rate etc etc but it doesnt appear to make a difference.

Whilst i've put up with it on an 'almost' daily basis, i'd love to know what the fix will be - Can anyone else advise?

If I go into display settings and switch away from the current colour profile and then immediately back to it on the display that has the issue it goes away... for a while.

Also sent feedback through feedback assistant but have had nothing back.

Hello All

im having the same color washed out I first installed a Dell 4k usb C 27 inch it looked horrible I then switched to an LG 600 W 27 : 4k HDMI 2.1 still the color is all washed out….. tomorrow I will try USB C port to DisplayPort cable Is Apple trying to fix this on the M1 Mac mini .?

I'm actually on a laptop. Upon installing OS 12.0.1 there is inadequate contrast throughout the system. I'm 79, and it appears the wunderkinder in Cupertino don't care about visual impairment. The so-called Contrast Adjustment (or similar wording) does essentially NOTHING to solve the problem. On forms in Safari and other applications, for example, the borders around text fields are now invisible, and one must mouse around to find them. In their zeal to be the creators of trendy designs they have IMHO screwed up much of the GUI.

I had to disable HDR to solve the issue (washed out display). I'm not saying that enabling HDR didn't solve the problem for you; I'm just illustrating that in different scenarios the solution may be completely opposite. So readers... try one... then try the other.

Thanks, but useless without a link or description of "HDR". Is it a system setting or ??? Actually, this page is a good example. On my Mbook Pro running 12.0.1 the field borders and text are in such a faint gray as to be nearly invisible without expanding the text to 18 or 24 point. It's not the size, it's the low contrast ratio.,

Dear Cupertino, aging and loss of visual acuity comes to all of us eventually. Your light gray text may be pretty and pleasing to your jr. college design instructor, but...

Thanks, but my problem is not with an external monitor. It's a laptop whose screen is always light gray on lighter gray. I have to pinch-expand to read anything. Weak contrast and no borders on input fields in forms. ???

Hey man. That worked for me! I have dual Samsung Curved 27" C27F591 and the one connected via USBc (Extended Monitor) had washed out colors. I tried every solution I found online to no avail until I read your post. I simply turned the monitor off and then back on. That fixed it for now! Thank you!

Thanks for the reply, David Oldenburg.

Based on the information you've provided, we recommend you Contact Apple Support for additional troubleshooting options.

Take care.

Try to disable High Dynamic Range option if you don't use it.

Totally agree

Have m1 air and LG27UL850-W, connected thought USB-C, colours are totally washed up

Anyone seeing a difference on 11.3?

Well. I did try Airplay after the above post. Tried with Apple TV connected to Samsung. Did not work. Back to HDMI @30Hz. :-(

Has anyone retested with 11.3.1?

Yes. No change. Now wait for 11.4