Complementary colours

Correct answer: B, complementary colours. Complementary colours are placed opposite one another on the colour wheel. Because they differ strongly in hue, placing them together usually produces a vivid and noticeable contrast. This can make objects stand out and can attract attention in a composition, although the result also depends on brightness, saturation, and the amount of each colour used. A is wrong because analogous colours are neighbours on the colour wheel and usually blend more smoothly. C is wrong because a monochromatic scheme uses variations of one colour, so its main difference is usually value rather than hue. D is wrong because neutral colours are generally subdued. Memory cue: opposite on the wheel usually means strongest colour contrast.

Correct answer: A, reduce intensity to create balance. Complementary colours are colour opposites that create strong visual contrast when placed together. This contrast can be useful for emphasis, but if both colours are very saturated, the result may feel harsh or restless. The artist can reduce the intensity of one or both colours, perhaps by using a more muted version, so the contrast becomes easier to look at while the colour relationship remains visible. A is correct because it directly controls the strength of the colour contrast. B is wrong because erasing shapes changes the composition rather than adjusting colour. C is unrelated to visual contrast. D changes lettering, not the relationship between the colours. Memory cue: when complementary colours shout too loudly, mute them rather than removing the whole design.

Correct answer: B, complementary contrast. A poster must often communicate quickly, so a clear difference between colours can help important lettering, symbols, or images stand out. Complementary colours are strongly separated in colour relationships, and their contrast can attract the eye when used carefully. A is wrong because an all-grey scheme may be quiet and unified, but it does not normally provide the strongest immediate colour contrast. C is wrong because very little value difference makes adjacent areas harder to separate visually. D is wrong because muted analogous colours are close in hue and generally create harmony rather than a sharp visual signal. B is correct, though good design still requires readable value contrast, suitable proportions, and restraint; excessive intensity can reduce comfort or legibility. Memory cue: posters need a visual signal—strong contrast helps emphasis, while harmony supports calm unity.

Direct answer: A, when a calm and subtle mood is needed but the contrast becomes too strong. Complementary colours are opposite or near-opposite relationships on a colour wheel, such as red and green or blue and orange. Because they differ strongly, they can create visual energy, emphasis, and attention. That strength is useful in a poster, a warning sign, or an area that must stand out, so B, C, and D are suitable situations rather than risks in this question. However, a quiet sea, peaceful interior, or delicate emotional scene may require gentle harmony. Strong complementary contrast can then feel noisy, restless, or overpowering. The colours are not inherently wrong; the risk comes from using their intensity or proportion without matching the intended mood. Memory cue: complementary colours are powerful attention tools, so use them carefully when softness and calm are the goal.

Correct answer: A. Complementary colours sit opposite each other on the colour wheel and can create strong visual contrast, especially when both are highly saturated. Reducing the saturation of one colour and adding a neutral area can soften the contrast and give the eye a place to rest. Making both colours brighter or using them everywhere would generally increase the visual intensity; removing all value contrast is unnecessary.

The governing concept is complementary contrast: colours opposite each other on the colour wheel create the strongest complementary relationship. Yellow lies opposite violet, so yellow is violet’s complement and option C is correct. Red and blue are components or neighbours related to violet, while green is not directly opposite violet in the traditional wheel. Opposite placement, rather than simple similarity, determines the answer.