What is a colour palette in design?

Roles, not swatches

Picking five colours you like is the easy part; deciding what each one is allowed to do is the part that makes a palette work. A useful role set has a surface for backgrounds and panels, an ink for body text, a muted ink for secondary lines such as dates and fine print, a brand colour for the largest coloured shapes, and an accent reserved for the one thing a reader must notice, usually the price or the call to action. Mature design systems publish colours this way. The GOV.UK Design System, for example, lists its colours under functional names such as text, link and focus rather than as a loose collection of hex codes, so a designer reaches for a purpose, not a shade.

Palette vs theme

The two words are often used as if they meant the same thing, and they do not. A palette is only colour. A theme is a palette applied to a layout, together with the other styling decisions that travel with it: which colour sits on which surface, the typeface, and the sizes of headings and body text. Two flyers can share a palette and still look different because their themes assign the colours differently, one putting the brand colour behind the headline and the other using it only for a thin rule. When someone says a design looks off brand, the colours are usually right and the roles are wrong. That is also why swapping a theme can change the mood of a flyer far more than swapping a single colour: the theme moves every role at once, while a hand edit changes one box and leaves the rest of the page speaking a different language.

When a palette earns its keep

A palette matters most when more than one piece has to look related: a print flyer, the square post that announces it and the story that counts down to the day. It also matters when colour carries meaning. Red for a sale price, green for available and grey for sold out only work if those colours are never reused decoratively somewhere else on the page. The Web Content Accessibility Guidelines add a caution that applies on paper too: colour should not be the only way information is conveyed, because a reader with a colour vision deficiency may not see the difference, so a sale price should also be larger or labelled. A fixed palette makes that discipline easy to keep across a season of pieces.

Common mistakes

The most frequent mistake is spending the accent colour on large areas, which leaves nothing to highlight the part that matters. Close behind is choosing brand colours for their look on a swatch card and discovering that text set in them is hard to read against the background. Palettes also grow by accident: one extra blue for a chart, a slightly different green copied from a supplier's logo, and after three campaigns there are eleven colours with no roles. Finally, a palette checked only on a bright monitor can disappoint in print, because a printed sheet reflects light rather than emitting it and saturated screen colours usually come out duller on paper.

Where palettes show up in the flyer builder

The flyer builder offers 99 themes. Eighty eight are synthesised from palettes and 21 are hand authored, ten of which share a palette id with a synthesised one. The theme panel shows 42 top picks first, then the rest as more palettes, and the palettes fall into the four categories in the table. Choosing a theme recolours the whole flyer at once because every element reads its colour from the theme's roles. A single text block can still take a theme colour or a custom hex value through its Colour control, and that custom value is where a palette most often drifts. Chart series cycle through theme colours and have no colour control of their own. Style overrides are stored per canvas size, so a colour changed by hand on the A4 page does not follow the design to the story size.

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