Why suddenly spotlight got this red tint?

[TheGenerous]

MacOS 10.14.6,
Mac Mini (Late 2012), 2.5 GHz i5
16 GB 1333 MHz DDR3
Intel HD Graphics 4000 1536 MB

Enabled (Accesibility - reduce transparency)

I noticed spotlight on my computer has a red/pink tint. I don't want it.
How can I turn it back to default white? thank you

 

[barbu]

what colour is your wallpaper? I bet it's red. Pretty sure Spotlight is just picking up the desktop colour.

 

[TheGenerous]

what colour is your wallpaper? I bet it's red. Pretty sure Spotlight is just picking up the desktop colour.

thank you, these are the wallpapers I'm using in four desktops

Changing them, or making a tile doesn't show any red in the wallpaper background. The spotlight tint remains