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Measurements
Unit Description
% a percentage of something
in inch
cm centimeter
mm millimeter
em one em is equal to the font size of the current element
ex one ex is the x-height of a font, the x-height is usually
about half the font-size
pt point (1 pt is the same as 1/72 inch)
pc pica (1 pc is the same as 12 points)
px pixels (a dot on the computer screen)
Colors
Unit Description
color_name A color name (red)
rgb(x,x,x) A rgb value (rgb(255,0,0))
rgb(y%, y%, y%) A rgb percentage value (rgb(100%,0%,0%))
#rrggbb A hex number (#ff0000).
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