In HTML, a color can be specified using a hexadecimal value in the form: #rrggbb

Where rr (red), gg (green) and bb (blue) are hexadecimal values between 00 and ff (same as decimal 0-255)

To display white, set all color parameters to 00, like this: #000000

To display black, set all color parameters to ff, like this: #ffffff

hsl(hue, saturation, lightness)

Hue is a degree on the color wheel from 0 to 180

Saturation is a percentage value, 0% means a shade of gray, and 100% is the full color

Lightness is also a percentage value, 0% is black, and 100% is white

An HTML iframe is used to display a web page within a web page

An iframe can’t be used as the target frame for a link.

The target attribute of the link must refer to the name attribute of the iframe

The HTML … element is a container for the following elements: <title>, <style>, <meta>, <link>, <script>, <base>

… element is a container for metadata

metadata are called (data about data)

HTML metadata is data about the HTML document

Metadata is displayed

Metadata typically define the document title, character set, styles, scripts, and other meta information

<meta> element is typically used to specify the character set, page description, keywords, author of the document, and viewport settings

The metadata will be displayed on the page, are used by browsers (how to display content or reload page), by search engines (keywords), and other web services

Defines a set of navigation links

Defines an independent, self-contained content