I was curious about the Switch 1 screen, and although it has really poor motion clarity, its color calibration isn't bad. It's better than, for example, the Samsung smartphone I had, which leans heavily toward blue.
I compared the Switch 1 screen with my monitor, which is properly calibrated with external equipment, with same brightness, and you can see that the colors on the monitor are more "vivid" (I believe this is because the color gamut is slightly larger, since my monitor has 100% sRGB and the Switch 1 probably doesn't reach that), but other than that, the colors are very close to the real thing.
Switch 2, on the other hand, is said to be leaning heavily toward blue, like basically all screens on the market that are not properly calibrated.