Colour balance in posters

Poster design depends on quick communication from a distance, so colour is used to establish emphasis and visual hierarchy. A bright, well-placed colour contrasts with surrounding areas and can attract the viewer’s eye toward an important heading, image, or message. It should still be combined with readable text and adequate balance. Bright colour cannot hide the paper, erase writing, or increase sound, so option A is the only valid answer.

The governing design concept is contrast and visual readability. Text is easiest to read when its colour differs sufficiently in lightness or hue from the background, because the letters become clearly separated from the surrounding area. Therefore, option A is correct. Identical text and background colours reduce visibility, while invisible text or a background without readable lettering defeats the communicative purpose of a poster.

A poster attracts attention when important text or imagery is separated clearly from its background. Red and white usually provide a strong, immediately readable contrast in hue and value, so option B is the best answer among the choices. Two nearly identical colours have little contrast, and very light yellow beside white may be difficult to read. The exact effect can depend on size and placement, but contrast is the governing principle.

The governing concept is contrast for legibility. Text must differ sufficiently from its background in value, hue, or saturation so that its edges remain visible at the intended viewing distance. With very low contrast, letters blend into the background, reducing readability and weakening the poster’s message. Therefore option A is correct. Low contrast does not guarantee clarity, produce sound, or remove a colour wheel. Designers should test text size and contrast together.

The governing design concept is visual emphasis. Primary colours are generally strong, clear, and easy to notice, so they can attract a viewer’s attention and make a poster’s message easier to read quickly. Thus option A is correct. They do not always look grey, they can be printed or painted, and they may be used for lettering, symbols, or important images rather than only for backgrounds. Contrast and colour balance still matter.

The governing concept is colour dominance in poster composition. A dominant colour is the one given the greatest visual emphasis through area, placement, contrast or repetition, so it attracts attention and establishes the poster’s main impression. Because the question states that red is the main colour while yellow and blue support it, red functions as the dominant colour. It is still a primary colour, but “secondary” describes colour formation, not compositional role. Option C is correct.

The governing design concept is contrast, which means making the lettering visually different from its background. Strong contrast, such as dark letters on a light field or light letters on a dark field, improves visibility and reading speed. Therefore, option A is correct. The other choices hide, dirty, or physically alter the poster and do not improve letter clarity.

The governing design concept is colour contrast. Complementary colours are opposite or near-opposite partners on the colour wheel, so placing them together produces a strong visual difference. That difference can make lettering, symbols, or an important image stand out and can increase a poster’s attraction when used in balance. Therefore option A is correct; the other choices concern materials or tools, not visual impact.

White raises the value of a colour and lowers the visual strength of the original hue. If too much white is added, the poster colour may become excessively light, pale, or less intense, so option A is correct. A darker result would require black or another dark pigment. White does not normally create a metallic surface or turn every colour green; those choices do not follow the governing mixing principle.