Designed for the Dark: Mi’s Features for When Light Is the Enemy

The Problem No One Designs For

You know the moment.

The pain has arrived. The room is dark. Curtains closed. And yet — you need to log something. Check a medication timer. Find a quiet corner of your phone that won’t send a spike of white light straight into your skull.

Most apps were not built for this. They were built for bright offices, outdoor use, high-contrast readability in sunlight. The default assumption is a user who is awake, alert, and comfortable.

A migraine attack destroys every one of those assumptions.

After 30 years of living with migraine, I built Mi around a different one: sometimes your user can barely open their eyes. Every color, every tap count, every brightness decision in this app starts from that place.

Why Light Actually Hurts

Photophobia — light sensitivity during migraine — is not “the screen is too bright.” It is a neurological cascade that makes ordinary room light feel like a physical assault.

Up to 90% of people with migraine experience it during an attack. ^[1][2] The mechanism involves a pathway most people have never heard of. Photic signals from your retina travel to thalamic neurons that also process pain from the meninges — the membrane surrounding your brain. ^[3] Light and headache pain converge on the same neurons.

When you are mid-attack, your trigeminal pain system is already firing. Any incoming light signal does not stay in the “vision” department. It amplifies the pain signal directly. ^[3][4] This is why light does not merely annoy. It genuinely hurts.

Not all light hurts equally. Research from Harvard Medical School found that green light exacerbates migraine significantly less than white, blue, amber, or red. ^[4] Blue light activates the thalamic pain pathway most powerfully. Green activates it least. ^[4][5] These are not minor differences in patient preference — they are measurable differences in neurological pain output.

And photophobia does not switch off between attacks. Studies show that even headache-free migraineurs tolerate less ambient light than people without migraine history. ^[6][22] The sensitized brain is always partially primed. Every light interaction is a question of threshold management, not just comfort. ^[21]

What a Standard App Screen Does to Your Brain

A typical app on default settings is a bundle of photophobia triggers.

A white background emits near-maximum luminance across all wavelengths — including the blue range that most powerfully activates thalamic pain neurons. ^[4] Every text block becomes a light source pointed at a sensitized visual cortex. ^[7]

Digital screens concentrate their emission in the 415–455 nm blue range — precisely the wavelengths that activate melanopsin in intrinsically photosensitive retinal ganglion cells. ^[7][8] These cells do not just manage vision. They feed directly into the pain-relevant thalamic pathway. ^[3]

Many screens also use pulse width modulation (PWM) to control brightness — rapidly switching pixels on and off to simulate dimness. That invisible flicker can trigger headaches in sensitive individuals even when they cannot consciously perceive it. ^[8][9]

The result: the phone you need during an attack is the same phone most likely to make the attack worse.

A survey of dark mode users found that 52% switch to dark mode specifically as a migraine management strategy. ^[11] More than one-third of Slack users who requested a dark theme cited photophobia or migraine as the reason. ^[12] The demand is real. The science backs it.

How Mi’s Dark Theme Was Built Around the Science

Mi runs exclusively on a dark theme. There is no light mode — not by oversight, but by decision.

The background (#16181C) is not pure black. Pure black on an OLED screen creates extreme contrast with any bright element, which amplifies visual discomfort in sensitive users. ^[13] Near-black absorbs ambient light, reduces overall screen luminance, and on OLED displays — where black pixels emit zero light — cuts the blue light reaching your retinas dramatically. ^[14]

The text color (#BDBDBD) is warm gray, not white. Pure white on dark background creates a 21:1 contrast ratio — technically excellent for readability, neurologically harsh for photophobic eyes. Warm gray achieves legibility while reducing the luminance of every character on screen. ^[9]

The accent palette — dusty lavender (#5B4B70), muted teal (#6B9BAA), desaturated green (#6AAA7A), and antique gold (#C5A059) — was chosen with the color science of photophobia in mind. Every tone is desaturated, low-intensity. No pure blue. No white. No bright red. The most aggravating wavelengths are absent from the interface. ^[4][5]

The warm greens are not accidental. Research consistently identifies green as the wavelength least likely to worsen migraine headache. ^[4][5] Even at low intensity, these tones sit at the safest end of the photophobia spectrum. You are looking at them every time you open the app.

The Second Problem: Cognitive Load Hurts Too

Photophobia gets the most attention. But migraine is not only a visual disease.

During an attack, the entire sensory system is dysregulated. Researchers describe migraine as fundamentally a disorder of sensory threshold. ^[15][23] Up to 70% of migraineurs experience cutaneous allodynia during attacks — meaning even a light touch on skin becomes painful. ^[16][17] Phonophobia affects a similar proportion. The migraine brain during an attack is overloaded across every channel simultaneously. ^[18][20][24]

This matters for app design because cognitive demand is sensory input. Every decision point on screen is a small neurological tax. Every menu to parse, every setting to locate, every unnecessary tap adds to a system that is already at its limit.

Core functions during an attack — logging pain, checking a medication timer, opening Breathing Garden — require one or two taps from any screen in Mi. Navigation uses large, well-spaced touch targets. No precision required from fingers that may themselves be hypersensitive. ^[17]

This is exactly why we built Breathing Garden. It asks nothing of you. One tap. A slow visual rhythm takes over. The research on controlled breathing for acute pain is meaningful ^[19] — but the design intention is simpler. Sometimes what you need is not information. It is a quiet, low-light anchor that does not think at you.

Using Mi During an Attack

You do not need to set anything up. Mi’s dark theme is always on.

• When an attack starts: Open Mi → tap the attack log → enter your pain level and symptoms in three taps. Drop your phone brightness to minimum on a near-black interface and almost no light reaches your eyes.
• No searching: Medication timers you have set previously appear on the home screen automatically. Everything is where you left it.
• If the pain is overwhelming: Open Breathing Garden from the home screen. Watch the slow green pulse. Let it set the pace of your breath. Nothing else is required.
• When it passes: Everything you entered is saved. Review your full attack log when you can actually look at a screen without wincing.