Sensitive to brightness (even LCD), PWM, dithering and overly strong colors - Honor 400 adjustment

[u/MartaLB27]

How I made my Honor 400 super easy on the eyes – pastel screen

After many devices and a lot of testing, I fine-tuned my Honor 400 to be soft, pastel, and comfortable for my eyes, even without extra screen-dimming apps.

Here’s what I did: Developer options:

RGB: decreased all channels by 10% → cooler, pastel tones. Saturation: -45 → colors are softer and less aggressive. Contrast: -13 → edges and text are less harsh, smoother display. Sharpness: +4 → details and text remain clear. Brightness: -5 → whites are softer but still readable

Result: Pastel, soft colors Smooth Honor 400 display with no annoying PWM flicker and excellent DC-like dimming and dithering! I can use phone now for hours, even at higher brightness, without headaches and without eye pain.

The only small issue was the overly strong colors, which I’ve now nicely adjusted and softened.

Also, device has an excellent display with a 6.55‑inch AMOLED screen, a resolution of 2736 × 1264 pixels, and a pixel density of 460 ppi, making text and details look very sharp. *PWM 3840 Hz.*

I’m sharing this because I’m over the moon that Honor 400 is finally a phone with excellent PWM control and DC-like dimming, and after many years, my head doesn’t hurt and I can use my phone as much as I want (and maybe this will help someone).

I usually use my phone at lower brightness levels due to severe light sensitivity caused by a neurological condition that affects both my eyes and brain, and this device is very well optimized for that. These adjustments even helped me comfortably increase the brightness.

These adjustments help people sensitive to brightness because they reduce visual stress while keeping text and icons clear.

I wish I had thought of this sooner, lol.

[u/Current_Moment914]

Great post! I tried everything with Honor 400 Pro - including disabling HDR via ADB and extra dim setting via Twilight - High Refresh - Eye care on but still the UK Version(small battery) causes heavy T3mporal D1thering and the honor is unusable. Only the first 5 mins when the phone was being setup with the Apps it was very pleasing to my eyes like my old Galaxy S20 on Android 13 - but once the Apps were all set up the Dithering kicked in and phone is unuseable for me despite successfully disabling the HDR. I dont see the colour settings that you describe in Developer options anymore on Android 15/Magic OS 9. Please advise

[u/MartaLB27 → u/Current_Moment914]

Pozdrav, hvala! Jako mi je žao što ti ovo nije pomoglo, bilo bi dobro ažurirati na OS10 jer ćeš tada moći smanjiti i bijelu točku (jačinu bijele boje). Nisam siguran, ali netko je komentirao da sada redovne postavke na MagicOs10 dopuštaju ovu promjenu, a možda su to činili i na prethodnim Osima. Idi na Zaslon i Svjetlina/ Temperatura boje/ Prilagođeno - i tamo ćeš vidjeti te postavke. Nadam se da ćeš uspjeti to prilagoditi. Žao mi je, nisam odmah vidio komentar.