M — A–Z

Every CSS entry starting with M, grouped by kind. Pseudo-classes, pseudo-elements and types are filed by their first letter, ignoring the leading :, :: or <.

Name	Description
Color
`Mark`	System colour: the background of marked text.
`MarkText`	System colour: marked text.
`magenta`	Named colour #ff00ff, the same as fuchsia.
`maroon`	Named colour #800000.
`mediumaquamarine`	Named colour #66cdaa.
`mediumblue`	Named colour #0000cd.
`mediumorchid`	Named colour #ba55d3.
`mediumpurple`	Named colour #9370db.
`mediumseagreen`	Named colour #3cb371.
`mediumslateblue`	Named colour #7b68ee.
`mediumspringgreen`	Named colour #00fa9a.
`mediumturquoise`	Named colour #48d1cc.
`mediumvioletred`	Named colour #c71585.
`midnightblue`	Named colour #191970.
`mintcream`	Named colour #f5fffa.
`mistyrose`	Named colour #ffe4e1.
`moccasin`	Named colour #ffe4b5.
Function
`matrix()`	A 2D transform given as six matrix values.
`matrix3d()`	A 3D transform given as a 4x4 matrix of 16 values.
`max()`	The largest of its comma-separated arguments.
`min()`	The smallest of its comma-separated arguments.
`minmax()`	A grid track size between a minimum and a maximum.
`mod()`	The modulus of a division, with the sign of the divisor.
Keyword
`math`	Generic font family: a font for mathematical notation.
`monospace`	Generic font family: every character the same width.
Media feature
`monochrome`	Bits per pixel on a monochrome device, or 0.
Property
`margin`	Shorthand for the four physical margins outside the border.
`margin-block`	Shorthand for the block-start and block-end margins.
`margin-block-end`	The margin after a box in the block axis; the bottom margin in English.
`margin-block-start`	The margin before a box in the block axis; the top margin in English.
`margin-bottom`	The margin below the border.
`margin-inline`	Shorthand for the inline-start and inline-end margins.
`margin-inline-end`	The margin at the end of the line; the right margin in English.
`margin-inline-start`	The margin at the start of the line; the left margin in English.
`margin-left`	The margin to the left of the border.
`margin-right`	The margin to the right of the border.
`margin-top`	The margin above the border.
`margin-trim`	Discards child margins that meet the container edge.
`marker`	Shorthand for the start, middle and end markers of an SVG shape.
`marker-end`	The marker drawn at the last vertex of an SVG shape.
`marker-mid`	The marker drawn at every middle vertex of an SVG shape.
`marker-start`	The marker drawn at the first vertex of an SVG shape.
`mask`	Shorthand for the mask layers that hide parts of an element.
`mask-border`	Shorthand for a mask sliced over the edges like border-image.
`mask-border-outset`	How far the mask border extends beyond the border box.
`mask-border-repeat`	How mask border slices are stretched or repeated.
`mask-border-slice`	Where to cut the mask border image into corners and edges.
`mask-border-source`	The image used for a mask border.
`mask-border-width`	The width of the mask border on each side.
`mask-clip`	The area a mask affects.
`mask-composite`	How each mask layer combines with the layers below it.
`mask-image`	The images or SVG masks used as mask layers.
`mask-mode`	Whether a mask layer is read by alpha or luminance.
`mask-origin`	The box mask images are positioned and sized against.
`mask-position`	Where each mask image sits in its origin box.
`mask-repeat`	How mask images tile.
`mask-size`	The size of each mask image.
`mask-type`	Whether an SVG mask uses the luminance or alpha of its content.
`math-depth`	Nesting depth in a MathML formula, used to shrink scripts.
`math-shift`	How far superscripts are raised in MathML.
`math-style`	Display or compact inline layout for MathML formulas.
`max-block-size`	An upper limit on the size of a box along the block axis.
`max-height`	An upper limit on the height of a box.
`max-inline-size`	An upper limit on the size of a box along the inline axis.
`max-width`	An upper limit on the width of a box.
`min-block-size`	A lower limit on the size of a box along the block axis.
`min-height`	A lower limit on the height of a box.
`min-inline-size`	A lower limit on the size of a box along the inline axis.
`min-width`	A lower limit on the width of a box.
`mix-blend-mode`	How an element blends with the content behind it.
Pseudo-class
`:modal`	Matches an element that blocks the rest of the page, such as a modal dialog.
`:muted`	Matches a media element that is muted.
Pseudo-element
`::marker`	The bullet or number box of a list item.
Unit
`mm`	One millimetre.
`ms`	Milliseconds; 1000ms is 1s.