Monochrome works when the brand voice is minimal, technical, or editorial. It removes one whole axis of decision making — there is no 'is the green right with the blue' debate — but it forces every other axis (typography, layout, motion) to carry hierarchy.
Color glossary
Monochrome Palette
A palette built from a single hue, varying only saturation and lightness.
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Primary Color
The signature hue that identifies a brand and drives main CTAs and navigation surfaces.
Secondary Color
A supporting hue that complements the primary, used for less critical UI like tags, secondary buttons, and chart series.
Accent Color
A high-saturation contrast color used sparingly to emphasize one or two elements per screen.
WCAG Contrast Ratio
The luminance ratio between two colors, used by the Web Content Accessibility Guidelines to measure legibility.
Analogous Palette
Three colors adjacent on the color wheel, typically within 30 degrees of each other.
Complementary Palette
Two hues directly opposite on the color wheel — for example blue and orange, red and green.