change screen color temperature Kelvin degrees - ZUK Z2

hello,

i reentry changed from setting my screen color to 2700k for night mode auto switch , after an auto update this option lost from menu settings display or probably changed sub-menu ;

the result is that i got stacked and cant change back to original at my ZUK Z2 device , i do not want to factory reset because that will need to much time to set apps logins again .

Does anyone got any idea where this option is now available ?