A measure of the height of a set of text on an element.
A selector that can be applied to any HTML element. Classes should be used when designing for multiple instances. For example, if you want all <h1> tags in the website to look blue, then you could use the class="blue-text" attribute.
The print resolution of a printer. It's a measure of how many dots per inch can be printed on paper. Higher DPI means more detail and smoother transitions between colours.
The portion of a letter such as y, p, q or j that hangs below the baseline of the text.
An observation in Psychology that suggests that the number of mental objects the average person can keep track of is seven (plus or minus two).
A greater typographic weight than the standard typeface, often used to highlight text that the writer wants to emphasise or denote sections, headlines or quotes in printed material.
Bold type is a little heavier than the average type because of its higher contrast, making it more readable. The opposite of bold type is light type, also known as regular or book.
A concept used in systems design to describe the negative consequences of making seemingly innocuous design changes. Shorthand for a product's delayed but inevitable need to be reworked due to earlier, seemingly trivial decisions not having been fully thought through in the original release.
Designers incur this "debt" by making quick and easy choices that save time in the present but cause more complex problems later on down the road when it becomes necessary to change or add something.
A triad is a group of three colours that are equally spaced on the colour wheel.
A set of colors which can be used to create a particular visual effect. It is usually composed of multiple primary, secondary, and tertiary colours.
The art and technique of arranging type to make written language legible, readable, and appealing when displayed.
A specific set of colours, usually with a limited number of values, chosen to suit the needs of a particular design.