Blue: 64 shades, names and colour codes

Blue often recalls sky and water. Light blue can support an airy palette, while navy gives a composition more visual weight. These associations depend on culture and the particular shade.

Before pairing blue, give it a role: pale blue across a large area, navy to establish structure, or a vivid blue to draw attention. Its intensity matters as much as its colour name when choosing a companion. These three approaches offer different starting points.

Blue and off-white: give each surface room

A slightly warm off-white can soften navy without weakening its presence. In a living room, try light walls, a blue sofa and a few echoes in the cushions. On a website, keep the background light and use blue for headings or buttons. If the combination feels too cool, introduce light wood or linen before adding a fourth bright colour.

Blue and terracotta: introduce a controlled contrast

Muted terracotta introduces a visible warm contrast alongside deep or greyed blue. Let one colour dominate and give the other a smaller area: an armchair, illustration or callout panel. Two equally vivid blocks can compete for attention. Reduce the saturation of one before abandoning the combination altogether.

Blue and green: separate their lightness

Petrol blue and sage can form a subtle combination if their surfaces remain distinct. Try petrol on one clearly defined feature and sage in a lighter area. For a poster, separate them with an ecru background and check the lettering: different hues can still be very close in lightness.

Sky blue leaves more room for materials and small contrasts; test it with ecru and light brown. Navy can support brighter accents such as ochre. Electric blue benefits from a clearer hierarchy: reserve it for a pattern or an important action. Swapping one of these blues for another calls for a fresh look at the proportions.

For a first mock-up, try roughly 65% linen, 25% navy and 10% terracotta. These are starting proportions rather than a rule. Enlarge the accent only if doing so supports the main subject.

Navy fabric, midnight-blue paint and a slightly violet print may look coordinated separately yet disagree side by side. Compare them together. Choose either a close match or a difference large enough to feel deliberate; an accidental near-match can be more distracting than an intentional contrast.