randtypen

Randtypen, literally border types, is a term used in design and digital typography to describe the styles and appearances of borders that enclose or separate content. The concept covers borders around blocks of text or images, frames in print layouts, and user interface elements such as buttons and panels.

In CSS and other styling systems, the term maps to the border-style property, which offers eight primary values: none, solid, dotted, dashed, double, groove, ridge, inset and outset. Each value specifies how the border lines are drawn rather than their width or color, which are controlled separately by border-width and border-color.

Solid and dotted or dashed borders are common for clean, simple delineation; double creates a parallel-line effect; groove, ridge, inset and outset simulate a 3D impression by contrasting light and dark areas. The choice of randtypen interacts with border color, width, and background to produce different textures and visual weight.

Choosing border types affects readability, accessibility, and visual hierarchy. Sufficient contrast between the border and surrounding content improves detection, and consistent border styles help maintain a cohesive appearance across a page or application.

Historically, border styles evolved with CSS specifications and design guidelines, becoming a standard tool in web design for creating separation and emphasis without imagery. See also CSS, typography, and page layout for related concepts.