Hisense U6N Mini-LED TV colors look wrong, washed out or tinted

The checks in more detail

Start with the picture mode. Press the settings button, open Picture, and choose a mode such as Movie, Theater Night or Filmmaker for accurate color, instead of Vivid or Dynamic, which push colors and shift the white point to blue; Standard is a fair general choice. Check the color temperature, which should be Warm or the equivalent for natural whites, and reset the picture settings if someone has changed color, tint or sharpness. A tint that is too green or magenta can come from the Tint control.

In a bright room, use Energy Saving or ambient light settings carefully, since an automatic brightness feature can dull colors. Check the source and HDR. HDR content looks flat if the TV is not switched into HDR mode for that input, or if the HDMI cable or port does not carry the signal; use a high-speed HDMI cable on the port labeled for 4K HDR, and enable the enhanced or HDMI 2.0 mode for that input in the settings.

A streaming box set to the wrong output, such as 4:2:0 or a low color depth, also gives poor color; set the box to automatic or 4K HDR. Check that the app is playing HDR or Dolby Vision content. Update the TV software in Settings, System, and the apps. Try the same content on another device to rule out the source. If colors stay wrong on every source with a reset, a factory reset of the TV may help, and if the screen shows a colored tint or bands, contact Hisense support with the model number.