Clinical White

Clean is a colour temperature before it is anything else. A white with any yellow in it reads as paper that has aged, a wall that has been smoked in, or a cloth that has been washed too many times. The same white pushed cool reads as new.

The pale blue greys do the second half of the job. They give the picture somewhere to put a shadow without introducing a hue, which is why this palette can describe a real object and still look sterile.

Run the whites cool and keep them cool in the shadows too. A warm shadow under a cool white undoes the whole effect in one place.

Keep the lighting even and flat. A deep shadow is the other thing that makes a clinical set look like an ordinary room.

Allow one accent and make it do a job. The green here is the instrument colour: a reading, a status, a single active control. The slate blue on the pale ground reaches about 9.1 to 1, so it carries the text.

Use it for medical packaging, a laboratory, skincare, dental, a device that has to look safe, or a technical diagram that has to look impartial.

Leave it alone for food and for anything that has to feel comfortable. Cool white makes food look refrigerated and a room look unoccupied.

Alpine Snow is also white and cool, but it carries the blue of real shadow on snow and it is a landscape. This palette is even, flat and made.

Brand Safe Neutrals is the warm answer to the same question. The two are near opposites, and mixing them gives a white that reads as neither clean nor comfortable.

Hospital packaging, laboratory equipment and skincare all converged on the same cool white and pale blue grey, with a single green or blue for the active element. The convention is strong enough that a warm white on a medical box now reads as a counterfeit.

The whites come back warm, and the picture looks like an old office. Say no warmth anywhere and ask for cool whites and pale blue greys.

A deep shadow arrives and the set stops reading as clean. Say even flat lighting and no colour in the shadows.