I don't know what setting you used in the high pass filter, but it appears that it was fairly high. That usually creates a contrast effect. I am no expert but I have played around with the high pass filter and for sharpening, I usually don't go much higher than a setting of three. High amount of the high pass filter have the potential to shift the hue & saturation levels.
Google "High Pass Filter" and you will find a number of article on the high pass filter for sharpening. Several years ago, I found a tutorial where the high pass filter, with high setting was used for increasing contrast. This tutorial used the "Blend IF" controls on the layer to withhold the effect of the settings from the shadows and highlight thus only increasing the contrast in the midrange.
Donb10 added 8 Minutes and 52 Seconds later...Double Post Merged Below
I don't know what setting you used in the high pass filter, but it appears that it was fairly high. That usually creates a contrast effect. I am no expert but I have played around with the high pass filter and for sharpening, I usually don't go much higher than a setting of three. High amount of the high pass filter have the potential to shift the hue & saturation levels.
Google "High Pass Filter" and you will find a number of article on the high pass filter for sharpening. Several years ago, I found a tutorial where the high pass filter, with high setting was used for increasing contrast. This tutorial used the "Blend IF" controls on the layer to withhold the effect of the settings from the shadows and highlight thus only increasing the contrast in the midrange.
http://www.phototechmag.com/tips/07sept.html