By Arca Jalee Wellness 26.08.2026

Turns Out, the Colour Green Is Surprisingly Good For You – Here's Why

The hue of your bed sheets might matter more than you think...

"Go outside and touch grass" can be an insult or a prescription.

Aimed one way, it's a diagnosis: you have lost contact with reality. Aimed another way, it's simply good advice.

Anyone having a bad day will find, after tromping grumpily through a park, that their negative thoughts begin to recede. Exercise, fresh air and sunshine can take some of the credit for the benefits of such a promenade, but a significant and surprising amount goes to something often taken for granted:

You were seeing green.

The colour green is soothing; green represents nature’s default, and nature cuddles you. Green is good. Our behaviour reliably demonstrates this: we’ll pay more for the apartment facing the park, we’ll crowd the kitchen windowsill with plants we may forget to water, we’ll say things like "go outside and touch grass" with dim awareness of the millions of years of evolution that have conspired to distil that statement into truth.

In fact, if the science is anything to go by, even the most staunchly anti-nature, plant-killing, green-loathing person is not immune to green medicine.

Why do we gravitate to green?

Our red-green vision is thought to have evolved so our ancestors could quickly and accurately pick something out against a mass of foliage – ripe fruits, younger leaves (which are evidently more protein-rich), or frighteningly poisonous insects in a variety of flamboyant colours – to survive and thrive.

We can extrapolate from this that green is to us as water is to fish. It’s simply there, an experiential default. Put something fuchsia among greenery and your brain will comb it out before you’ve consciously looked at it, or for it. That’s what’s interesting about green; looking at it alone tells your nervous system: nothin’ to see here, you can let your focus drift.

The benefits of seeing green, according to science

Several studies have looked at the health benefits of seeing the colour green – specifically green in nature – and found meaningful positive outcomes. Below, just some of what the science says.

It may improve recovery from illness

In 1984, a psychologist named Roger Ulrich compared twenty-three surgical patients whose windows faced a stand of trees with twenty-three whose windows faced a brick wall. The tree-facing patients went home sooner, needed less pain medication, and their nurses wrote fewer unpleasant things about them in the notes.

It may reduce depression and high blood pressure

The exposure time required to benefit from greenery is much less than you'd imagine. A study of around 1500 Brisbane residents found that visits to green space averaging just thirty minutes or more across a week were associated with meaningfully lower rates of depression and high blood pressure.

It may support a healthy stress response

In one study, ninety people worked in an office facing either a window with actual nature outside, a plasma screen showing a live high-definition feed of that same view, or a blank wall. The real window performed best, in terms of how fast heart rates recovered from mild stress. The plasma window performed like the blank wall… not great. The body was not fooled, and would like to go outdoors, please.

The meaning of green in colour psychology

A quick caveat: colour psychology is a fraught field. When someone insists a wavelength will completely regulate your nervous system, they are well ahead of the evidence and probably holding a swatch. Nothing you put on a wall does exactly what a copse of trees does.

What does hold up is the association itself. Interestingly, there is some universality in what people feel and think of when it comes to the colour green.

Green is associated with calm

When researchers asked nearly 4600 people across 30 nations and 22 languages which emotions they attached to which colours, the associations were largely unanimous. They found that green means calm, safety, nature and positive valence to nearly everybody.

That's a fact about people rather than a fact about wavelengths – making it useful to know when you're choosing a set of bedsheets or wall paint.

Shade matters more than you think

The catch is that green has a volume knob; its shade is significant. Green is versatile like that. It’s brighter to the human eye than any other colour, which is why laser levels are green, and why high-vis is that specific shade apparently formulated in a laboratory to be visible from space.

Turning up the volume on green gives less tranquillity and more… unignorably blinding exit sign. Colour in a room is not a dose of tonic you absorb through your eyes like a vitamin. It's a cue for your nervous system: information about what kind of place you're in and what's expected of you in it.

Red, for instance, is an event. Yonks ago, it was a genuine event to spot red fruit against a brush of foliage, and our vision hasn't changed much since. Imagine a bedroom with fire-engine red walls, and the adjectives that come to mind aren't "calm" or "zen-like" but "emergency!?" and "IT SURE IS LOUD IN HERE."

How to bring the benefits of green into your home

All of this bears thinking about when selecting bedding, because your sheets are usually the largest single field of colour in the bedroom. It would be discourteous to yourself to sleep in a colour you feel is shouting at you. If you are thinking of going green, based on the science, we'd argue it would be wisest to opt for shades that are drawn from nature.

Consider Eucalyptus: a muted "nothin' to see here" and "let nature cuddle you" green, with none of the exit sign, “attention please” green. Hues like Olive and Sage, which are also inspired by shades in nature, offer similarly calming qualities.

So, there's no wavelength working on your nervous system like a drug, but rather a strong associative connection giving it the cue (in the instance of particular shades of green) to downshift and relax.