Css font weight bold color

font-weight

The font-weight CSS descriptor allows authors to specify font weights for the fonts specified in the @font-face at-rule. The font-weight property can separately be used to set how thick or thin characters in text should be displayed.

For a particular font family, authors can download various font faces which correspond to the different styles of the same font family, and then use the font-weight descriptor to explicitly specify the font face’s weights. The values for the CSS descriptor is same as that of its corresponding font property.

There are generally limited weights available for a particular font family. When a specified weight doesn’t exist, a nearby weight is used. Fonts lacking bold typeface are often synthesized by the user agent. To prevent this, use the font-synthesis shorthand property.

Syntax

/* Single values */ font-weight: normal; font-weight: bold; font-weight: 400; /* Multiple Values */ font-weight: normal bold; font-weight: 300 500; 

The font-weight property is described using any one of the values listed below.

Values

Normal font weight. Same as 400 .

Bold font weight. Same as 700 .

In earlier versions of the font-weight specification, the property accepts only keyword values and the numeric values 100, 200, 300, 400, 500, 600, 700, 800, and 900; non-variable fonts can only really make use of these set values, although fine-grained values (e.g. 451) will be translated to one of these values for non-variable fonts.

CSS Fonts Level 4 extends the syntax to accept any number between 1 and 1000, inclusive, and introduces Variable fonts, which can make use of this much finer-grained range of font weights.

Common weight name mapping

The numerical values 100 to 900 roughly correspond to the following common weight names:

Value	Common weight name
100	Thin (Hairline)
200	Extra Light (Ultra Light)
300	Light
400	Normal
500	Medium
600	Semi Bold (Demi Bold)
700	Bold
800	Extra Bold (Ultra Bold)
900	Black (Heavy)

Variable fonts

Most fonts have a particular weight which corresponds to one of the numbers in Common weight name mapping. However some fonts, called variable fonts, can support a range of weights with more or less fine granularity, and this can give the designer a much closer degree of control over the chosen weight.

For TrueType or OpenType variable fonts, the «wght» variation is used to implement varying weights.

Accessibility concerns

People experiencing low vision conditions may have difficulty reading text set with a font-weight value of 100 (Thin/Hairline) or 200 (Extra Light), especially if the font has a low contrast color ratio.

Formal definition

Formal syntax

Examples

Setting normal font weight in a @font-face rule

The following finds a local Open Sans font or imports it, and allows using the font for normal font weights.

@font-face  font-family: "Open Sans"; src: local("Open Sans") format("woff2"), url("/fonts/OpenSans-Regular-webfont.woff") format("woff"); font-weight: 400; > 

Specifications

Browser compatibility

BCD tables only load in the browser

See also

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font-weight

The font-weight CSS property sets the weight (or boldness) of the font. The weights available depend on the font-family that is currently set.

Try it

Syntax

/* Keyword values */ font-weight: normal; font-weight: bold; /* Keyword values relative to the parent */ font-weight: lighter; font-weight: bolder; /* Numeric keyword values */ font-weight: 100; font-weight: 200; font-weight: 300; font-weight: 400; /* normal */ font-weight: 500; font-weight: 600; font-weight: 700; /* bold */ font-weight: 800; font-weight: 900; /* Global values */ font-weight: inherit; font-weight: initial; font-weight: revert; font-weight: revert-layer; font-weight: unset; 

The font-weight property is specified using any one of the values listed below.

Values

Normal font weight. Same as 400 .

Bold font weight. Same as 700 .

One relative font weight lighter than the parent element. Note that only four font weights are considered for relative weight calculation; see the Meaning of relative weights section below.

One relative font weight heavier than the parent element. Note that only four font weights are considered for relative weight calculation; see the Meaning of relative weights section below.

In earlier versions of the font-weight specification, the property accepts only keyword values and the numeric values 100, 200, 300, 400, 500, 600, 700, 800, and 900; non-variable fonts can only really make use of these set values, although fine-grained values (e.g. 451) will be translated to one of these values for non-variable fonts using the Fallback weights system.

CSS Fonts Level 4 extends the syntax to accept any number between 1 and 1000 and introduces Variable fonts, which can make use of this much finer-grained range of font weights.

Fallback weights

If the exact weight given is unavailable, then the following rule is used to determine the weight actually rendered:

• If the target weight given is between 400 and 500 inclusive:
  • Look for available weights between the target and 500 , in ascending order.
  • If no match is found, look for available weights less than the target, in descending order.
  • If no match is found, look for available weights greater than 500 , in ascending order.

  Meaning of relative weights

  When lighter or bolder is specified, the below chart shows how the absolute font weight of the element is determined.

  Note that when using relative weights, only four font weights are considered — thin (100), normal (400), bold (700), and heavy (900). If a font-family has more weights available, they are ignored for the purposes of relative weight calculation.

  Inherited value	bolder	lighter
  100	400	100
  200	400	100
  300	400	100
  400	700	100
  500	700	100
  600	900	400
  700	900	400
  800	900	700
  900	900	700

  Common weight name mapping

  The numerical values 100 to 900 roughly correspond to the following common weight names (see the OpenType specification):

  Value	Common weight name
  100	Thin (Hairline)
  200	Extra Light (Ultra Light)
  300	Light
  400	Normal (Regular)
  500	Medium
  600	Semi Bold (Demi Bold)
  700	Bold
  800	Extra Bold (Ultra Bold)
  900	Black (Heavy)
  950	Extra Black (Ultra Black)

  Variable fonts

  Most fonts have a particular weight which corresponds to one of the numbers in Common weight name mapping. However some fonts, called variable fonts, can support a range of weights with a more or less fine granularity, and this can give the designer a much closer degree of control over the chosen weight.

  For TrueType or OpenType variable fonts, the «wght» variation is used to implement varying widths.

  Note: For the example below to work, you’ll need a browser that supports the CSS Fonts Level 4 syntax in which font-weight can be any number between 1 and 1000 . The demo loads with font-weight: 500; . Change the value to see the weight of the text change.

  Accessibility concerns

  People experiencing low vision conditions may have difficulty reading text set with a font-weight value of 100 (Thin/Hairline) or 200 (Extra Light), especially if the font has a low contrast color ratio.

  Formal definition

  Initial value	normal
  Applies to	all elements. It also applies to ::first-letter and ::first-line .
  Inherited	yes
  Computed value	the keyword or the numerical value as specified, with bolder and lighter transformed to the real value
  Animation type	a font weight

  Formal syntax

  font-weight =
  |
  bolder |
  lighter

  =
  normal |
  bold |

  Examples

  Setting font weights

  HTML

  p> Alice was beginning to get very tired of sitting by her sister on the bank, and of having nothing to do: once or twice she had peeped into the book her sister was reading, but it had no pictures or conversations in it, "and what is the use of a book," thought Alice "without pictures or conversations?" p> div> I'm heavybr /> span>I'm lighterspan> div> 

  CSS

  /* Set paragraph text to be bold. */ p  font-weight: bold; > /* Set div text to two steps heavier than normal but less than a standard bold. */ div  font-weight: 600; > /* Set span text to be one step lighter than its parent. */ span  font-weight: lighter; > 

  Result

  Specifications

  Browser compatibility

  BCD tables only load in the browser

  See Also

  Found a content problem with this page?

  This page was last modified on Feb 21, 2023 by MDN contributors.

  Your blueprint for a better internet.

  MDN

  Support

  Our communities

  Developers

  Visit Mozilla Corporation’s not-for-profit parent, the Mozilla Foundation.
  Portions of this content are ©1998– 2023 by individual mozilla.org contributors. Content available under a Creative Commons license.

  Источник

  CSS font-weight Property

  The font-weight property sets how thick or thin characters in text should be displayed.

  Default value:	normal
  Inherited:	yes
  Animatable:	yes. Read about animatable Try it
  Version:	CSS1
  JavaScript syntax:	object.style.fontWeight=»bold» Try it

  Browser Support

  The numbers in the table specify the first browser version that fully supports the property.

  CSS Syntax

  Property Values

  Value	Description	Demo
  normal	Defines normal characters. This is default	Demo ❯
  bold	Defines thick characters	Demo ❯
  bolder	Defines thicker characters	Demo ❯
  lighter	Defines lighter characters	Demo ❯
  100 200 300 400 500 600 700 800 900	Defines from thin to thick characters. 400 is the same as normal, and 700 is the same as bold	Demo ❯
  initial	Sets this property to its default value. Read about initial
  inherit	Inherits this property from its parent element. Read about inherit

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