Graphic Design Glossary: 40 Essential Terms Explained

Short, clear explanations of terms you'll meet often in graphic design, in alphabetical order.

A

Alpha channel: The channel that stores how transparent each pixel is. PNG and WEBP support alpha; JPG doesn't.

B

Bleed: The part of a print design extended beyond the trim line so no white edge appears after cutting; usually 3 mm.

Brand identity: A brand's consistent visual system of logo, colors, typefaces and visual language.

C

CMYK: The print color model using cyan, magenta, yellow and black inks. Some on-screen RGB colors can't be printed in CMYK.

Color palette: The limited set of colors used in a design or brand.

Complementary colors: Colors directly opposite each other on the color wheel that create strong contrast side by side.

Composition: How elements are arranged within a space; it sets balance, focus and flow.

Contrast: The difference in color, tone or size between elements. Text-to-background contrast is critical for legibility.

D

DPI / PPI: Dots (DPI) or pixels (PPI) per inch. 300 DPI is the usual print recommendation; on screens the pixel size is what matters.

F

Favicon: The small site icon shown in browser tabs and bookmarks.

Font family: A group of fonts sharing one design in different weights and styles (e.g. Regular, Medium, Bold, Italic).

G

Golden ratio: A ratio of about 1:1.618 used to create balanced proportions in composition.

Gradient: A smooth transition between two or more colors; linear, radial and conic types are common.

Grid: An invisible system of columns and rows used to align elements on a page.

H

HEX code: A color's red, green and blue values written in base 16, e.g. #1F3FD6.

Hue: The basic kind of color, such as red, blue or green; its position on the color wheel.

K

Kerning: Adjusting the space between a specific pair of letters (e.g. A and V).

L

Leading: The vertical distance between the baselines of lines of text.

Logo: A symbol, wordmark (logotype) or combination of both that represents a brand.

Lorem ipsum: Placeholder text used to show a layout before the real copy is ready.

M

Mockup: A presentation image showing how a design looks in real use (e.g. a T-shirt, packaging or screen).

Moodboard: A board of colors, textures, photos and references that sets a project's visual direction.

N

Negative space: The empty space around and between elements; it lets a design breathe and sharpens focus.

O

Opacity: How non-transparent an element is; 100% is fully visible, 0% fully transparent.

P

Pantone: A standardized color system that identifies colors by number for consistent printing.

Pixel: The smallest colored dot that makes up a digital image.

R

Raster: An image made of pixels (JPG, PNG); it loses sharpness when enlarged.

RGB: The screen color model based on red, green and blue light.

Rule of thirds: Dividing an image into nine equal parts with two horizontal and two vertical lines and placing key elements on the intersections.

S

Safe zone: The area where content stays clear of edges that may be hidden by interface elements or trimming.

Sans-serif: A typeface style without small strokes (serifs) at letter ends; common on screens.

Saturation: How vivid a color is; as saturation drops, the color moves toward gray.

Serif: The small strokes at letter ends, and typefaces that have them.

T

Thumbnail: A small preview image of a video or content; on YouTube it directly affects click-through rate.

Tracking: Evenly increasing or decreasing the spacing across all letters in a word or block of text.

Typography: Choosing and arranging typefaces, sizes, spacing and layout so text is legible and effective.

V

Vector: An image built from mathematical lines and shapes that stays sharp at any size (SVG, AI, EPS).

Visual hierarchy: Ordering elements by importance with size, color, contrast and position to guide the reader's eye.

W

Watermark: A semi-transparent text or logo added to show ownership and discourage unauthorized use.

White space: Another name for negative space in design; it doesn't have to be white.