Colour mixing

Orange is produced mainly from red and yellow. If the mixture looks too red, the governing correction principle is to add a small amount of the component colour that is relatively lacking. Adding a little yellow shifts the hue toward a more balanced orange, so option C is correct. Blue, violet, or black would darken, neutralise, or muddy the mixture and would not correct a red-dominant orange as directly. Add the correction gradually.

Green is commonly formed from blue and yellow. When a green mixture is too blue, it lacks sufficient yellow relative to the blue. Adding a small quantity of yellow shifts the hue toward yellow-green, making option D correct. Red and violet introduce opposing or additional blue-red influence and can dull the mixture, while black only lowers its value. The safest method is to add yellow in small stages and test the result.

Violet is a mixture of red and blue. If it appears too red, the mixture has a relative shortage of blue, so adding a small amount of blue restores the balance; option A is correct. Yellow or green can neutralise and dull violet because they introduce a contrasting yellow influence. White only makes the violet lighter and does not correct the red-blue ratio. Small additions are important because too much blue can make the colour overly cool.

A brown can be formed by combining complementary or near-complementary colours, and its visual temperature changes according to the dominant bias. Blue and orange with more blue can produce a brown carrying a cool, bluish influence, so option C is correct. Red-white, yellow-white, and violet-white mixtures are mainly light tints of their named colours, not the most suitable route to a cool brown. The blue should be added carefully to avoid an overly dark or dull result.

The governing concept is value or lightness in colour mixing. Grey is produced by combining black and white, and increasing the proportion of black lowers the value, making the grey darker. Therefore, option B is correct. Yellow in white makes a pale yellow, white in red makes pink, and yellow in blue generally produces green rather than grey.

The governing concept is a tint: a tint is made by adding white to a hue. Orange is a warm colour close to the base of many peach shades, so adding white lightens it into a soft peach-like colour. Thus option C is correct. Blue with black becomes very dark, green with violet gives a muted mixture, and yellow with blue generally produces green.

Olive green is a subdued, yellow-leaning green. The governing mixing idea is to modify an existing green with a small amount of yellow and then reduce its brightness slightly with a tiny amount of black. Therefore option D is suitable. Red and white make pink, blue and white make a light blue tint, and violet and white make a light violet tint, not olive green.

The governing concept is shading: adding a darkening colour lowers the lightness of a base colour. A small quantity of black deepens red, while a little blue can shift it toward the cool, deep red family associated with maroon. Hence option B is the best answer. White would create pink, extra yellow would make a warmer orange-red, and green with white would reduce the red intensity and lighten it.

The governing concept is complementary or near-complementary mixing. Red and green lie opposite each other on the traditional colour wheel; when mixed in a controlled ratio, they reduce one another’s saturation and can produce a neutral, earthy brown. Thus option D is correct. Blue and white make a light blue tint, yellow and white make pale yellow, and green with white makes a light green tint.

The governing concept is reproducibility: a mixture can be repeated only when its variables are controlled. Recording the proportions of each colour, and preferably keeping a small sample swatch, provides a guide for the next batch. Therefore option A is correct. A different brush or paper size does not preserve the recipe, while mixing without measurement makes the result unpredictable.

The governing concept is tinting and loss of saturation. White increases lightness and, when added excessively, makes the mixture very pale and less saturated. As a result, the visual identity of the original hue may become weak, so option B is correct. White does not darken the colour, turn it automatically into its complement, or make it black; those effects contradict the role of white in a tint.

The governing concept is complementary colour mixing. A small amount of a colour’s opposite on the colour wheel can reduce brightness and deepen the original colour while preserving some colour character. Therefore, adding a complementary colour is useful when a natural-looking dark shadow is wanted, so A is correct. White would lighten the colour, water affects transparency, and neither paper shine nor a completely white result is produced.

The governing concept is colour value, which means the relative lightness or darkness of a colour. By preparing a sequence from light to dark, an artist can compare values and learn how tonal changes suggest form, volume, and depth. Thus A is correct. Paper texture concerns the surface, line direction concerns marks, and shape size concerns proportion rather than lightness and darkness.

The governing concept is correcting a colour mixture by using the complementary relationship between red and green. If green is dominant, add a small amount of red gradually and mix after each addition. This moves the mixture toward a more neutral brown, so B is correct. Adding green increases the imbalance, white makes a lighter tint, and water changes handling or transparency rather than correcting the green cast.

The governing concept is reducing intensity with a complementary colour. Red is opposite green on the colour wheel, so a very small amount of red neutralises some of green’s brightness and produces a more subdued, natural green. Thus B is correct. Yellow or blue shifts the green toward another hue, while white creates a lighter tint but does not effectively reduce saturation in the intended way.

The governing concept is a value scale, a controlled progression from light to dark. Increasing white creates lighter tints, while increasing black creates darker shades; varying these amounts gradually produces related steps of value in the same colour family. Therefore C is correct. Different primary colours change hue, equal water does not create a full value progression, and excessive complementary colour can neutralise the colour rather than form a clean scale.

Violet is produced by mixing red and blue. If more red is added, the balance of the mixture shifts toward red while it still retains some blue, so the resulting hue is red-violet. Blue-green requires blue and green, yellow-orange requires yellow and orange, and light green is unrelated to this red-blue mixture. Thus option C is correct.

Yellow-orange is an intermediate hue between yellow and orange, with the colour balance shifted toward yellow. Therefore, adding more yellow to orange produces yellow-orange. Adding yellow to green would move the mixture toward yellow-green, while adding green to blue gives blue-green. Red mixed with violet moves toward red-violet, not yellow-orange. Hence option D is correct.

Green is formed from yellow and blue. If a green mixture appears too blue, its yellow component is insufficient, so adding a small amount of yellow shifts the balance back toward green. Red or violet would introduce unrelated colour effects, and black would darken the mixture rather than correct its blue bias. Therefore, option A is the suitable adjustment.

Orange is made from red and yellow. When orange appears too yellow, the mixture contains relatively more yellow than red. Adding a small amount of red restores the balance and moves the colour toward ordinary orange. Blue or green would change the hue in an unintended direction, while white would only make the mixture lighter. Thus option B is correct.

Violet is a mixture of red and blue. A blue-violet mixture has a stronger blue influence, so increasing the red component shifts it toward a more balanced violet. Yellow and green would introduce different hue relationships, and white would create a lighter tint without correcting the red-blue proportion. Therefore, the correct choice is option C, red.

A lighter version of a hue is called a tint. It is made by adding white gradually and in controlled amounts, so the original hue remains recognisable while its value becomes lighter. A complementary colour can dull or neutralise the hue, black creates a shade, and many added colours make the result muddy. Therefore, option D is correct.

In colour theory, a shade is a darker version of a hue made by adding black. The amount of black should normally be controlled because too much can overpower the original colour. Adding white creates a tint, water mainly changes paint concentration or transparency, and glue functions as a binder rather than a colour modifier. Thus option A is correct.

A tint is a lighter version of a colour produced by mixing that colour with white. White increases the lightness while preserving the basic hue, especially when it is added gradually. Black produces a shade, a complementary colour may neutralise or dull the mixture, and soil introduces unwanted matter rather than a standard tint. Therefore, option B is correct.

Blue-green is the base hue, and adding white produces a tint of that hue. Thus mixing blue-green with white creates light blue-green while preserving its blue-green identity. Red and white create pink or light red, orange and black create a darkened orange-brown effect, and yellow with violet tends toward a dull or neutral mixture. Therefore, option C is correct.