Appendix: Value Types

Note

Not all value types are represented here, only the ones used in this book. There are additional types available for aural style sheets and counters. You can find information on these value types at www.w3.org/TR/REC-CSS2/syndata.html#values.

Value Types
Value Type	Available Values	Example(s)	Notes
Integers and Real Numbers	0-9	line-height: 1.3;
Lengths: Relative Units	Height of M (em) Height of X (ex) Pixels (px)	0.95em 1.0ex 14px	Relative unit lengths are scaled according to the size of the parent element.
Lengths: Absolute Units	Inches (in) Centimeters (cm) Millimeters (mm) Points (pt) Picas (pc)	1in 2cm 2mm 12pt 12pc	Absolute length units do not scale.
Lengths: Keywords	xx-small, x-small, small, smaller, medium, large, larger, x-large, xx-large	font-size: large	Keyword measurements do not necessarily scale. These keywords apply only to font-size.
Percentages	%	width: 100%
URL + URN =	URI url()	url(/images/012/logo.gif)
Colors: Keywords		color: orange;	Most named colors are not part of the web-safe palette.
Colors: Hexadecimal	#hexvalue	color: #FFFFFF
Colors: Hexadecimal Shorthand	#hexvalue	color: #FFF	Only available for paired values. All web-safe colors can be written in shorthand.
Colors: RGB	#hexvalue	color: (255, 255, 255)
Colors: RGB	%	color: (80%, 30%, 20%)