Color Combination with monochrome

Hello steemit friends,
I have bought to you by an unanimous feature of a smartphone. Rarely, None of us know it while we are in touch of mobiles very closely or it can be thought as we need more SAR to live rather than oxygen.

If you wanna go back to 90's where all the television shows were in black and white, you can get it within your mobile phone. It will feel like you are using your father of grandfather's mobile in 21st century.
The persons whose eyes are weak may adapt this. But the problem of pictures raise out. Whatever you captures any stuff, it will be faded as the selected standard vision mode is monochrome.
These steps will introduce you how to apply it.
Step 1 : Open the settings menu of your phone and tap on "additional settings" .

Step 2 : Turn on the "developer option" if it's off. ( If you are using another mobile instead of a mi product, the following steps can be different )

Step 3 : In Hardware Accelerated Rendering, select "stimulate colour space" .

Step 4 : Select "Monochromacy" out of four options. It will turn your cellphone into black and white.

There are four more options available under "stimulate colour space" :
Disabled : It has all present colour collections and this is selected by-default in all handsets.

Monochromacy : It gives black and white colour.

Deuteranomaly (red-green) : It has blue and yellow colour. Don't know why mi gave red-green name to this option. However, it's all in blue-yellow.

Protanomaly (red-green) : It has also blue and yellow colour but it's lighter than the previous one.

Tritanomaly(blue-yellow) : It has red and green colour effect.