Monochromatic colour scheme is :

Question

Accepted Answer

The correct option is 4:
A monochromatic color scheme is defined by the use of variations of a single hue, or base color. The term itself, derived from Greek roots, means "one color" (mono = one, chroma = color). These variations are achieved by modifying the base color with white (to create *tints*, or lighter values), with black (to create *shades*, or darker values), or with gray (to create *tones*, or duller values). Option 4, "Blue, Light Blue, Dark Blue," perfectly demonstrates this, as all three are variations of the singular base hue, Blue. 'Light Blue' is a tint and 'Dark Blue' is a shade, which together create a cohesive and harmonious palette that relies on value and saturation changes rather than a contrast of different colors.

The incorrect option is 1: Red, Yellow, Blue.
Option 1 is incorrect because it lists the three primary colors (Red, Yellow, and Blue), representing three entirely different hues. A color scheme consisting of three colors that are equally spaced around the color wheel is called a *Triadic* color scheme, which is known for its high visual contrast and vibrancy. A monochromatic scheme, by its fundamental definition, is restricted to one single color and its accompanying tints and shades, and therefore cannot include three separate primary colors. This option violates the core concept of a single base hue.

The incorrect option is 2: Green, Orange, Violet.
Option 2 is incorrect as it represents the three secondary colors (Green, Orange, and Violet). Like Option 1, this combination also constitutes a *Triadic* color scheme, as these colors are created by mixing the primary colors and are equidistant on the color wheel. This scheme is characterized by a strong, lively contrast among three distinct hues. Since a monochromatic scheme mandates that all colors be derived from a solitary base hue, a combination of three unrelated, pure secondary colors like Green, Orange, and Violet does not fit the criteria.

The incorrect option is 3: Red, Light Yellow, Dark Blue.
Option 3 is incorrect because, while it includes variations of light and dark, it mixes three different base colors: Red, Yellow, and Blue. For a scheme to be monochromatic, every color element must trace back to the same parent hue. Here, the presence of Red alongside variations of Yellow ('Light Yellow') and Blue ('Dark Blue') creates a multi-hued, non-monochromatic color scheme. Although it shows an understanding of varying the lightness of a color, the inclusion of three separate, pure hues invalidates it as a true monochromatic palette.