Colour mixing

The governing concept is adjustment of colour proportion. Green is made from yellow and blue; when the mixture is too blue, adding a small amount of yellow moves the balance toward a more even green. Option B is correct. Red may neutralise green and make it dull or brownish, violet adds more blue bias, and black changes the value by making the mixture darker rather than balanced. Add the correction gradually.

The governing concept is balancing the proportions of component pigments. Violet is produced by mixing red and blue. If it looks too red, a small amount of blue increases the blue component and reduces the visible red bias, so option C is correct. Adding more red would intensify the problem; yellow could dull or neutralise the violet, and green is not a primary component in this traditional mixture. Corrections should be gradual.

The governing concept is proportional correction in a pigment mixture. Orange is formed from red and yellow. If the mixture is too yellow, adding a little red increases the red component and brings the hue closer to balanced orange, making option D correct. More yellow would strengthen the error, while blue or green could dull, neutralise, or shift the colour in an unintended direction. Small additions prevent overcorrection.

In the traditional paint colour system, equal amounts of red and yellow combine to produce orange. Orange is a secondary colour because it is made by mixing two primary colours. Therefore, option C is correct. A primary colour is used as a starting colour and is not formed by mixing other colours in this system. Neutral and monochromatic describe other colour properties or schemes, not this mixture.

In the traditional paint system, green is produced by mixing blue and yellow. If blue is used in a greater proportion than yellow, the blue component has the stronger visual influence, so the mixture appears bluish green. Thus, option D is correct. A yellowish green would result when yellow were used in the larger amount. Red and grey are not the expected result of this two-colour mixture.

Orange is formed by mixing red and yellow. To shift orange toward red, the mixture must contain more red and less yellow, so option A is correct. Equal quantities normally give a balanced orange. More yellow would create a yellowish orange, while adding blue introduces a third primary colour and may dull or brown the mixture rather than producing a clear reddish orange. The governing idea is that the larger component influences the resulting hue more strongly.

Red and blue combine to produce violet in the traditional paint system. When more red is added, the mixture shifts toward the red side of violet and appears reddish violet, making option B correct. Bluish violet would be expected when blue is present in the greater amount. Yellow-green requires yellow and blue, while orange requires red and yellow, so options C and D do not follow from the stated mixture. The key principle is that the dominant component affects the hue.

Red and yellow first combine to make orange. When white is added to that orange mixture, the colour becomes lighter and less intense; this lighter version is called a tint. Thus, option C is correct. White does not change the mixture into green, violet, or blue. Green requires yellow and blue, violet requires red and blue, and blue is not produced by adding white. The governing concept is that white lightens a hue and creates its tint.

Adding a small amount of black lowers the lightness or value of blue, making it appear darker. In colour theory, a colour mixed with black is called a shade, so option D is correct. A tint is made by adding white, not black. The blue does not become a secondary colour because no second hue is mixed to create it, and adding black does not make blue warmer. The main concept is the difference between shade, tint, and hue.

The governing concept is controlled pigment mixing. Black is a highly dominant pigment, so even a small quantity absorbs much of the reflected light from yellow and makes it darker and duller. Therefore, black should be added gradually in a very small amount, with the mixture checked after each addition. Equal or larger amounts would overpower the yellow, while thick strokes describe an application method rather than a mixing proportion. Thus, option A is correct.

The governing concept is contamination during practical colour mixing. A brush that still carries traces of a previous pigment transfers those traces into the next primary colour. The added pigment changes the intended hue and can reduce both purity and brightness. A brush cannot make paint white by itself, and it does not prevent drying; greater purity is the opposite of the expected effect. Washing and wiping the brush before changing colours prevents this problem. Therefore, option B is correct.

The governing concept is subtractive mixing of pigments. Yellow, red and blue pigments each absorb selected parts of white light; when all three are mixed excessively, their combined absorption increases and the reflected light becomes less specific. Saturation and brightness therefore fall, producing a dull brownish or greyish appearance called muddiness. Paper absorption, brush size and water content do not explain this optical result. Thus, option C correctly states the reason.

The governing concept is hue as the basic colour family of a mixture. When the proportion of red is steadily increased, the balance of pigments changes, so the mixture shifts toward a redder hue. Its exact lightness or saturation may also change depending on the other pigments, but the direct and first-described change is the colour identity or hue. Paper thickness, brush length and drawing size are physical features of the materials or artwork, not properties changed by the pigment ratio. Thus, option A is correct.

This question tests colour mixing and the effect of combining opposing colour components. Violet is made from red and blue; adding yellow introduces a third primary colour that partly counteracts the violet mixture. Instead of increasing purity, the combined pigments absorb more light and the result may lose brightness, becoming muddy, greyish, or dull. Therefore option C is correct. It will not normally become pure white or green.

Colour mixing explains that clean yellow and blue pigments generally produce green. If the result is muddy rather than clear, an unwanted third colour may have entered through a dirty brush, contaminated palette, or impure paint. Red or brown contamination can reduce the green’s brightness and clarity. Therefore option B is correct. The fact that yellow and blue are primary colours is not itself a cause, while a clean palette and white paper do not create muddy pigment.

The governing concept is subtractive colour mixing with a limited palette. Combining primary colours in pairs creates secondary colours, and changing the proportion of each pigment produces many intermediate hues. Small additions of another primary can shift a colour toward a warmer, cooler, lighter, or darker appearance, depending on the medium. Therefore option A is correct. Repeatedly applying one colour, adding black everywhere, or leaving paper white cannot create a broad range of hues.

The governing concept is a tint: a colour becomes a tint when white is added to it. Increasing the white makes the mixture lighter and can help create soft backgrounds, highlights, illuminated surfaces, or gentle transitions. Therefore, option D is correct. White does not by itself create deep shadows, prove that a colour is primary, or clean a brush, so options A, B, and C do not fit the process.

The governing concept is subtractive colour mixing with a tinting effect. Red mixed with a small amount of yellow shifts toward a warmer orange direction. Adding a large amount of white raises the value and makes the mixture pale, so the likely result is a light warm pinkish-orange colour. Option B is therefore correct. Blue-violet and blue-green require blue, while a dark brown would require darker or more neutralising pigments, not mostly white.

The governing concept is colour mixing followed by lightening. A small quantity of yellow added to blue shifts the mixture toward green, but because the yellow is limited, the blue influence remains strong; the result is likely a bluish green. A larger amount of white makes that hue lighter, giving the light bluish-green described in option C. Red and orange require different mixtures, and brown is not the expected result here.

The governing concept is clean pigment mixing. Orange is made by combining red and yellow, and a clean brush prevents traces of blue, green, black, or another colour from contaminating the mixture. Such contamination can make orange dull or muddy. Thus option B gives both the correct pair and the necessary practical precaution. Adding blue, all three primaries, or extra black moves the mixture away from a clear orange.

The governing concept is proportion in colour mixing. If the relative amount of one primary pigment increases, the resulting mixture shifts toward that colour; for example, adding more red to a red–yellow mixture makes the orange appear more reddish. The paper length, brush size, and subject remain physical or planning choices and are not changed by the pigment ratio. Therefore option A, the hue of the mixed colour, is the direct effect.

In subtractive pigment mixing, each pigment absorbs some wavelengths of light. Mixing all three primary pigments in nearly equal amounts therefore absorbs much of the visible light and usually produces a muddy, dull brown or grey. Bright white is associated with reflected light rather than mixed paint, while orange and green require only particular pairs. Hence option B is correct.

The governing concept is subtractive colour mixing. A complementary pair, such as red and green or blue and orange, contains opposing colour tendencies; when their pigments are mixed, more wavelengths are absorbed and the mixture loses saturation. Therefore it usually becomes dull, brownish, greyish, or nearly neutral. Option B is correct; the colours become more vivid only when placed beside each other, not physically mixed.

The governing concept is complementary colour mixing. Violet, commonly treated as the complement of yellow, contains opposing colour tendencies; adding a small amount to yellow reduces its saturation and makes the yellow less brilliant. Therefore option B is correct. The limited quantity usually mutes the colour rather than producing a fully neutral mixture. It cannot turn yellow into pure green or white, and adjacency—not mixing—would be associated with increased visual contrast.

Mixing a colour with its complementary colour reduces saturation because the opposing hues partially neutralise one another, producing a duller or greyer result. Adding more of the same pigment does not inherently neutralise it, leaving it unmixed preserves its purity, and white paper may affect appearance but does not mix into the paint. Thus option A is correct.