Background color css firefox

background-color

The background-color CSS property sets the background color of an element, either through a color value or the keyword transparent .

/* Keyword values */ background-color: red; /* Hexadecimal value */ background-color: #bbff00; /* Hexadecimal value with alpha channel */ background-color: #11ffee00; /* 00 - fully transparent */ background-color: #11ffeeff; /* ff - fully opaque */ /* RGB value */ background-color: rgb(255, 255, 128); /* RGBA value or RGB with alpha channel */ background-color: rgba(117, 190, 218, 0.0); /* 0.0 - fully transparent */ background-color: rgba(117, 190, 218, 0.5); /* 0.5 - semi-transparent */ background-color: rgba(117, 190, 218, 1.0); /* 1.0 - fully opaque */ ​​​​​​​ /* HSLA value */ background-color: hsla(50, 33%, 25%, 0.75); /* Special keyword values */ background-color: currentcolor; background-color: transparent; /* Global values */ background-color: inherit; background-color: initial; background-color: unset;

 
 
skyblue
 
 
#bbff00;
 
 
rgb(240, 220, 180)
 
 
rgba(240, 220, 180, 0.5)
 
 
hsl(50, 60%, 75%)
 
 
currentcolor
 
 
transparent
 
 
 

#container < width: 100%; background-color: #F4F7F8; display: flex; flex-wrap: wrap; >.subcontainer < border: 1px solid black; height: 80px; margin: 10px; flex: 1 0 auto; display: flex; flex-direction: column; background-color: #dcdcdc; background-image: linear-gradient(45deg, rgb(0, 0, 0, 0.1) 25%, transparent 25%), linear-gradient(225deg, rgb(0, 0, 0, 0.1) 25%, transparent 25%), linear-gradient(225deg, rgb(0, 0, 0, 0.1) 25%, transparent 25%), linear-gradient(45deg, rgb(0, 0, 0, 0.1) 25%, transparent 25%); background-size: 20px 20px; background-position: 0 0, -10px -10px; >.color < width: 100%; flex: 1 0 auto; >.caption < background-color: white; padding: 10px; text-align: center; white-space: nowrap; color: black; font-family: monospace; font-weight: bold; >#keyword < background-color: skyblue; >#hex < background-color: #bbff00; >#rgb < background-color: rgb(240, 220, 180); >#rgba < background-color: rgb(240, 220, 180, 0.5); >#hsl < background-color: hsl(50, 60%, 75%); >#currentcolor < background-color: currentcolor; >#transparent

Syntax

Values

Is a CSS that describes the uniform color of the background. Even if one or several background-image are defined, this color can be affect the rendering, by transparency if the images aren’t opaque. In CSS, transparent is a color.

Formal syntax

 
where 
 = | | | | | | currentcolor | 
where 
 = rgb( [ [ <3> | <3> ] [ / ]? ] | [ [ #<3> | #<3> ] , ? ] )
 = rgba( [ [ <3> | <3> ] [ / ]? ] | [ [ #<3> | #<3> ] , ? ] )
 = hsl( [   [ / ]? ] | [ , , , ? ] )
 = hsla( [   [ / ]? ] | [ , , , ? ] )
where 
 = | 
 = | 

 
Lorem ipsum dolor sit amet, consectetuer
 
Lorem ipsum dolor sit amet, consectetuer
 
Lorem ipsum dolor sit amet, consectetuer
 

1. CSS
2. CSS Reference
3. CSS Background and Borders
4. Guides
   1. Border-image generator
   2. Border-radius generator
   3. Box-shadow generator
   4. Scaling background images
   5. Using CSS multiple backgrounds
   1. background
   2. background-attachment
   3. background-clip
   4. background-color
   5. background-image
   6. background-origin
   7. background-position
   8. background-position-x
   9. background-position-y
   10. background-repeat
   11. background-size
   12. border
   13. border-bottom
   14. border-bottom-color
   15. border-bottom-left-radius
   16. border-bottom-right-radius
   17. border-bottom-style
   18. border-bottom-width
   19. border-color
   20. border-image
   21. border-image-outset
   22. border-image-repeat
   23. border-image-slice
   24. border-image-source
   25. border-image-width
   26. border-left
   27. border-left-color
   28. border-left-style
   29. border-left-width
   30. border-radius
   31. border-right
   32. border-right-color
   33. border-right-style
   34. border-right-width
   35. border-style
   36. border-top
   37. border-top-color
   38. border-top-left-radius
   39. border-top-right-radius
   40. border-top-style
   41. border-top-width
   42. border-width
   43. box-shadow

   Источник

   background-color

   The background-color CSS property sets the background color of an element.

   Try it

   Syntax

   /* Keyword values */ background-color: red; background-color: indigo; /* Hexadecimal value */ background-color: #bbff00; /* Fully opaque */ background-color: #bf0; /* Fully opaque shorthand */ background-color: #11ffee00; /* Fully transparent */ background-color: #1fe0; /* Fully transparent shorthand */ background-color: #11ffeeff; /* Fully opaque */ background-color: #1fef; /* Fully opaque shorthand */ /* RGB value */ background-color: rgb(255 255 128); /* Fully opaque */ background-color: rgb(117 190 218 / 0.5); /* 50% transparent */ /* HSL value */ background-color: hsl(50 33% 25%); /* Fully opaque */ background-color: hsl(50 33% 25% / 0.75); /* 75% opaque, i.e. 25% transparent */ /* Special keyword values */ background-color: currentcolor; background-color: transparent; /* Global values */ background-color: inherit; background-color: initial; background-color: revert; background-color: revert-layer; background-color: unset; 

   The background-color property is specified as a single value.

   Values

   The uniform color of the background. It is rendered behind any background-image that is specified, although the color will still be visible through any transparency in the image.

   Accessibility concerns

   It is important to ensure that the contrast ratio between the background color and the color of the text placed over it is high enough that people experiencing low vision conditions will be able to read the content of the page.

   Color contrast ratio is determined by comparing the luminance of the text and background color values. In order to meet current Web Content Accessibility Guidelines (WCAG), a ratio of 4.5:1 is required for text content and 3:1 for larger text such as headings. Large text is defined as 18.66px and bold or larger, or 24px or larger.

   Formal definition

   Formal syntax

   Examples

   HTML

   div class="exampleone">Lorem ipsum dolor sit amet, consectetuerdiv> div class="exampletwo">Lorem ipsum dolor sit amet, consectetuerdiv> div class="examplethree">Lorem ipsum dolor sit amet, consectetuerdiv> 

   CSS

   .exampleone  background-color: transparent; > .exampletwo  background-color: rgb(153, 102, 153); color: rgb(255, 255, 204); > .examplethree  background-color: #777799; color: #ffffff; > 

   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 Jul 18, 2023 by MDN contributors.

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   Support

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   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

   background

   The background shorthand CSS property sets all background style properties at once, such as color, image, origin and size, or repeat method. Component properties not set in the background shorthand property value declaration are set to their default values.

   Try it

   Constituent properties

   This property is a shorthand for the following CSS properties:

   Syntax

   /* Using a */ background: green; /* Using a and */ background: url("test.jpg") repeat-y; /* Using a and */ background: border-box red; /* A single image, centered and scaled */ background: no-repeat center/80% url("../img/image.png"); /* Global values */ background: inherit; background: initial; background: revert; background: revert-layer; background: unset; 

   The background property is specified as one or more background layers, separated by commas.

   The syntax of each layer is as follows:

   • Each layer may include zero or one occurrences of any of the following values:
     • The value may only be included immediately after , separated with the '/' character, like this: " center/80% ".
     • The value may be included zero, one, or two times. If included once, it sets both background-origin and background-clip . If it is included twice, the first occurrence sets background-origin , and the second sets background-clip .
     • The value may only be included in the last layer specified.

     Values

     See background-clip and background-origin . Default: border-box and padding-box respectively.

     See background-color . Default: transparent .

     The following three lines of CSS are equivalent:

     background: none; background: transparent; background: repeat scroll 0% 0% / auto padding-box border-box none transparent; 

     Accessibility concerns

     Browsers do not provide any special information on background images to assistive technology. This is important primarily for screen readers, as a screen reader will not announce its presence and therefore convey nothing to its users. If the image contains information critical to understanding the page's overall purpose, it is better to describe it semantically in the document.

     Formal definition

     • background-image : none
     • background-position : 0% 0%
     • background-size : auto auto
     • background-repeat : repeat
     • background-origin : padding-box
     • background-clip : border-box
     • background-attachment : scroll
     • background-color : transparent
     • background-position : refer to the size of the background positioning area minus size of background image; size refers to the width for horizontal offsets and to the height for vertical offsets
     • background-size : relative to the background positioning area
     • background-image : as specified, but with url() values made absolute
     • background-position : as each of the properties of the shorthand:
       • background-position-x : A list, each item consisting of: an offset given as a combination of an absolute length and a percentage, plus an origin keyword
       • background-position-y : A list, each item consisting of: an offset given as a combination of an absolute length and a percentage, plus an origin keyword
       • background-color : a color
       • background-image : discrete
       • background-clip : a repeatable list of
       • background-position : a repeatable list of
       • background-size : a repeatable list of
       • background-repeat : discrete
       • background-attachment : discrete

       Formal syntax

       background =
       [ # , ]?

       =
       ||
       [ / ]? ||
       ||
       ||
       ||
       

       =
       ||
       ||
       [ / ]? ||
       ||
       ||
       ||
       

       =
       |
       none

       =
       [ left | center | right | top | bottom | ] |
       [ left | center | right | ] [ top | center | bottom | ] |
       [ center | [ left | right ] ? ] && [ center | [ top | bottom ] ? ]

       =
       [ | auto ] |
       cover |
       contain

       =
       repeat-x |
       repeat-y |
       [ repeat | space | round | no-repeat ]

       =
       scroll |
       fixed |
       local

       =
       border-box |
       padding-box |
       content-box

       =
       |

       =
       |

       =
       url( * ) |
       src( * )

       Examples

       Setting backgrounds with color keywords and images

       HTML

       p class="topbanner"> Starry skybr /> Twinkle twinklebr /> Starry sky p> p class="warning">Here is a paragraphp> p>p> 

       CSS

       .warning  background: pink; > .topbanner  background: url("starsolid.gif") #99f repeat-y fixed; > 

       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 Jul 18, 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