Iris has several types. This are some settings which many people use and I selected for you to get how Iris works more quickly.

Basically this are some different preset values made by me and in this article I will explain which every type does and when to use it.


Health mode are the presets which I and almost all users use. It’s made for slight blue light and brightness reduction. It feels really good on the eyes and doesn’t change the colors much.

During the day Color temperature will be 5000K and Brightness will be 100%

During the night Color temperature will be 3400K and Brightness will be 80%

Health mode during the night looks like this

Use it if you have no idea what to use and just want to protect your eyes and sleep better. You can customize it a little by changing the Mode


Sleep mode is for best sleep. It will remove all the blue light from your screen and set the Color temperature to 0K.

This is not exactly 0K, because zero kelvins are absolute black, but it removes all blue and green light and your screen will look like this

During the day the Brightness will be 100% and during the night it will gradually change to 80%.

Use sleep mode when you want to get to sleep in the fastest amount of time after using your PC.


Reading mode will make all your colors black and white like E-ink device.

I made it as a joke to show people how to turn any monitor into E-ink device, but it actually became really popular and I found some science why this is healthy.

It came out from conversation with one user and he told me that there is actually bigger problem than PWM and this is the subpixel flicker and changing polarity of the backlight.

We first tried to make Color overlay with random colors, but it turned out that this is actually worsening the subpixel flicker and grayscale mode or the Reading mode is actually solution for this.

I think this is the best mode for eye protection, because it makes the screen most healthy. It removes blue light, PWM and removes also subpixel flicker.


Ever read white page for hours and wished you have black theme. Well I made programming mode, because one of my editors didn’t have black theme and I was cursing it a lot.

Programming mode will revert your screen colors. It looks like this

So for example if you want to read this page with black theme

Using Programming mode will make it like this

I personally use this mode when I write something in editor with White theme and I am sure you will find your way. The bad thing is that pictures will be reverted also, but you will probably not look at pictures when you use Programming mode.


Biohacker is the combination of inverted colors and no blue light. You can say that it’s the combination between Sleep and Programming mode.

Biohacker mode looks like this

Use it if you want to hack your sleep somehow. Pause and activate it and measure your melatonin levels. This is not made for everybody, but use Biohacker mode if you like it.


So I was watching one scary movie and you know all the scenes was dark. I put my monitor at maximum brightness, but still it was too dark to see anything. I then closed Iris, but it was again too dark and my eyes got strained.

Then an idea came into my mind, what if I can increase the brightness over the maximum? The next days I tried to make this and I made it.

Basically Movie mode will pause all Iris color changes and will make the Brightness to 120%

This is how Movie mode looks like

And here is scene from Star Wars with normal screen and with Movie mode


I made Overlay mode for computers which don’t allow color changes on low-level or any color changes at all. Overlay mode places transparent overlay over the whole screen and it looks like this

You may think why do you need this, but there are several cases when this mode is useful.

Use overlay mode if you want all your colors to be as close to normal as possible, but still want to protect your eyes and have good night sleep.

Use overlay mode if you have multiple monitors connected with USB or with some docking station. On strange configurations like this, Overlay mode and High-level Color API are the only ways to get Iris running on all monitors.