Calibration report using these settings: [see below]
TV software/firmware version tested: 6.2, build 4126
Below you'll find the settings I found best for viewing the Insignia NS-55DR420NA16 in a dim room via the HDMI input. Your settings may vary depending on source, room conditions, and personal preference. Check out the Picture settings and calibration FAQ for more information.
Calibration notes: The Roku TV's controls are so sparse that a true calibration isn't possible, but that's not a terrible thing since its uncalibrated image is relatively accurate. Its best setting for a home theater environment is Movie Mode with TV Brightness set at "Darker," which I chose over "Dark" since it came closer to my target light level of 40 fL.
Compared to the TCL Roku TV, gamma was worse and the grayscale a bit bluer, but neither was terrible. There's no gamma control, and none of the other settings improved on gamma. I also tried the Normal color temperature but it was far less accurate than Warm.
Colors are quite accurate with five out of the six primaries and secondaries clocking in below my target Delta Error of 3. As a result I didn't touch the color or tint controls either.
-- Options menu
TV brightness: Darker
Picture mode: Movie
[other settings not relevant]
-- Advanced picture settings menu
Picture Mode: Movie
Dynamic Contrast: Off
Color temperature: Warm
Picture size: Direct
Game mode: Off
Help, my PC with Windows 10 won't shut down properly
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