Secondary colours

Correct answer: D. Red and green make yellow

Explanation: In the traditional RYB pigment system, the standard secondary colours are produced by pairing two primaries: red plus yellow gives orange, yellow plus blue gives green, and blue plus red gives violet. Thus A, B, and C are correct relationships. Option D is incorrect because green is already a secondary colour, not one of the three traditional primary colours used in these pairings.

Correct answer: C. Blue

Explanation: Under subtractive colour theory, cyan and magenta are two primary pigment colours. Cyan removes red light and magenta removes green light from white illumination, leaving blue as the dominant reflected component. Therefore, their mixture produces blue. Cyan plus yellow produces green, while magenta plus yellow produces red, so those alternatives describe different pigment pairs.

Correct answer: B. Additive light system

Explanation: In the additive RGB light system, red light and green light combine to produce yellow light, so yellow is a secondary colour in that system. Red, green and blue are the additive primaries. In subtractive pigment or printing models, yellow is treated as a primary component, so options A, C and D do not fit the stated classification.

Correct answer: C. Green

Explanation: In traditional pigment colour theory, yellow and blue are primary colours, and mixing equal amounts of them produces the secondary colour green. Therefore, option C is correct. Violet results from red mixed with blue, orange results from red mixed with yellow, and red is not produced by combining yellow and blue. The answer assumes paint or pigment mixing, not the mixing of coloured light.

Correct answer: A. Violet

Explanation: In the traditional pigment colour wheel, red and blue are treated as primary colours. Their mixture produces violet, a secondary colour, so option A is correct. Blue mixed with yellow produces green, and red mixed with yellow produces orange. Yellow itself is a primary colour in this model, not the result of mixing red and blue. The result can vary slightly with particular pigments, but violet is the expected school-level answer.

Correct answer: A. Between its two component primary colours

Explanation: A secondary colour is placed between the two primary colours from which it is made. For example, orange lies between red and yellow, green lies between yellow and blue, and violet lies between blue and red. Thus option A correctly describes the organising principle of the colour wheel. The centre or an arbitrary empty space does not show the colour’s mixing relationship or its position among neighbouring hues.

Correct answer: B. Red-orange

Explanation: Orange is the secondary colour made by mixing red and yellow. If red is used in a greater proportion, the mixture keeps its orange identity but shifts visually toward red, producing red-orange. Therefore, option B is correct. Yellow-orange would result when yellow is dominant. Blue-green belongs to the blue-yellow family, while red-violet is made from red and blue, so neither is an appropriate result here.

Correct answer: B. More yellow and less red

Explanation: Orange is created by mixing the primary pigments red and yellow. To make the resulting orange appear yellow-dominant, yellow must be present in a greater amount than red; therefore, option B is correct. More red would produce red-orange. Blue is not one of the components of orange, and equal blue and yellow would normally produce green rather than orange. The key principle is that the larger component influences the colour bias.

Correct answer: C. Blue

Explanation: Green is the secondary colour produced by mixing blue and yellow. If the mixture must look blue-dominant, the amount of blue should exceed the amount of yellow, so option C is correct. Increasing yellow would shift the mixture toward yellow-green. Red and orange are not the two primary components used to form green in this traditional pigment model. The colour’s bias follows the component present in the larger proportion.

Correct answer: A. Increase the amount of yellow

Explanation: Green is formed by mixing blue and yellow pigments. To shift green toward yellow and obtain yellowish green, the proportion of yellow must be increased; therefore, option A is correct. Increasing blue would create bluish green. Adding red introduces another colour component and may dull the mixture, while black changes its value by darkening it rather than creating the desired yellow bias. The answer follows the dominance principle in colour mixing.

Correct answer: B. More red and less blue

Explanation: Violet is the secondary colour produced from red and blue. When red is used in a greater proportion than blue, the violet shifts toward red and is described as red-violet, making option B correct. More blue would create blue-violet. Yellow is not a component of violet in this traditional model, and equal yellow and blue produces green rather than violet. The dominant component determines the visible colour bias.

Correct answer: C. Toward blue

Explanation: Violet is made by mixing red and blue pigments. If the amount of blue is increased, the mixture moves visually toward blue and may be called blue-violet, so option C is correct. It does not shift toward green because green is formed from yellow and blue, and it does not move toward orange, which comes from red and yellow. This demonstrates that a greater proportion of one component biases the resulting hue toward that component.

Correct answer: B. Use a clean brush and palette

Explanation: The governing practical concept is avoiding contamination while mixing paint. A clean brush and palette prevent traces of another colour from entering the mixture, allowing the intended two primary colours to produce a bright, clear secondary colour. A dirty brush can introduce a third colour, black dulls the mixture, and combining all three primaries commonly produces a muddy neutral result. Therefore, option B is correct.

Correct answer: A. Blue entered the mixture

Explanation: The governing concept is that a clean secondary colour requires only its two component primaries. Red and yellow normally produce orange, but accidental blue introduces the third primary. Together, red, yellow, and blue absorb or neutralise more of the visible colour, making the mixture dull brown rather than clear orange. A larger amount of either red or yellow mainly changes the orange’s bias, and a clean palette prevents contamination. Therefore, option A is correct.

Correct answer: A. Yellow

Explanation: The governing concept is keeping a secondary-colour mixture limited to its two intended primaries. Violet is produced from red and blue. If yellow accidentally enters, all three primary pigments are present, and yellow is also complementary to violet on the traditional colour wheel; this can reduce violet’s brightness and make it muddy. Green or orange may alter the hue, while white mainly lightens it. Therefore, option A is correct.

Correct answer: A. Because it is formed by mixing red and blue

Explanation: Violet is a secondary colour produced by mixing the primary colours red and blue. Because both pigments contribute to the mixture, violet may look more reddish when red is used in greater proportion or more bluish when blue dominates. White added to green produces a tint of green, not violet. Violet is therefore evidence of colour mixing, not a primary colour.

Correct answer: C. Blue

Explanation: In the traditional artist’s colour wheel, blue is positioned opposite orange, so blue is orange’s complementary colour. Opposite colours create strong visual contrast and can make each other appear more vivid when placed side by side. Red and yellow are neighbouring warm colours that help form orange, while green is not directly opposite orange in this colour model.

Correct answer: A. Red

Explanation: Green is a secondary colour made by mixing the primary colours yellow and blue. On the traditional colour wheel, red lies directly opposite green; therefore red is green’s complementary primary colour. Yellow and blue are ingredients used to create green, not its complementary partner. Orange is another secondary colour and is not positioned directly opposite green.

Correct answer: B. Yellow

Explanation: Yellow is directly opposite violet on the traditional colour wheel, making it violet’s complementary colour. This opposite placement produces a strong contrast when the two colours are placed together. Blue and red are primary colours used to mix violet, so they are related to its formation rather than being its complement. Orange is not directly opposite violet in the standard wheel.

Correct answer: B. Complementary contrast

Explanation: Orange and blue are complementary colours because they occupy opposite positions on the traditional colour wheel. Placing them together creates strong complementary contrast, helping both colours appear more noticeable and lively. A monochromatic scheme uses variations of one hue, while a colourless effect has no meaningful hue. Therefore, low contrast and the other listed effects do not describe this pairing.

Correct answer: A. Red

Explanation: Red is complementary to green on the traditional colour wheel. Adding a small amount of its complement reduces green’s saturation or intensity and moves the mixture toward a more muted, neutral colour. Adding blue or yellow usually keeps the mixture within the green family, while white makes a lighter tint without truly neutralising the hue. Too much red may make the result muddy.

Correct answer: A. Yellow

Explanation: Yellow is complementary to violet on the traditional colour wheel, so a small amount of yellow can reduce violet’s intensity and make it appear more muted. This works because complementary pigments tend to neutralise one another when mixed. Red and blue are the primary colours used to create violet, not its complement. Green is also not directly opposite violet in the standard artist’s wheel.

Correct answer: B. Blue

Explanation: Blue is the complementary colour of orange in the traditional art colour wheel. Mixing a small amount of blue into orange reduces its saturation and brightness, producing a more subdued or neutral appearance. Green is not the direct complement, while yellow or red generally keeps orange warm and may increase its vividness. The amount matters: too much blue can make the mixture dark or muddy.

Correct answer: B. Secondary colour scheme

Explanation: Orange, green and violet are the three conventional secondary colours. Orange results from red plus yellow, green from yellow plus blue, and violet from blue plus red. A painting restricted to these three hues therefore uses a secondary colour scheme. It is not primary because primary colours are red, yellow and blue; it is not monochromatic because three hues are present, and it is not specifically a complementary pair.

Correct answer: B. Make one colour dominant and use two as supporting colours

Explanation: A balanced secondary colour scheme usually benefits from one dominant colour supported by the other two in smaller or carefully placed areas. This creates visual hierarchy, prevents the composition from becoming confusing, and allows the eye to rest. Using all three colours equally everywhere can produce competition rather than balance. Making everything black removes the colour relationship, while one tiny dot does not establish a complete scheme.