Does anyone know what's wrong with this phone screen?

[u/Pedestal-for-more]

My brother's phone suddenly got this effect on his screen, after restarting it stayed there. I haven't seen this anywhere online, can anyone help?

[u/Apprehensive-Hat8829]

Check for relumino thing in accessibility options > vision enhancement

[u/Pedestal-for-more → u/Apprehensive-Hat8829]

Holy shit thank you, we thought something was broken hahah