I have a problem with my secondary monitor: I calibrated it with Windows Color Calibration, and I have the problem that it displays grey tones (like the grey background of the Stack Exchange code block) as white. All colors other than that seem normal.

Do I need to set any more preferences that may resolve this issue?

  • External monitor: PHILIPS 170S (1280 x 1024)
  • Graphics card: NVIDIA GeForce GT 640M
  • Connection: Graphics card HDMI out, HDMI to VGA converter, to Monitor

1 Answer 1


The issue is likely that model of computer monitor.

PCMag noted this in their review of the monitor.

Philips 170S Review & Rating | PCMag.com

Cons: Limited viewing angle. Weak on light-gray performance. Tilt-only base.


Light-gray performance was weak, even after we adjusted the contrast settings.

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