background-color
Quick Summary for background-color
background-color CSS property sets the background color of an element.
Code Usage for background-color
/* 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: rgba(117, 190, 218, 0.5); /* 50% transparent */ /* HSL value */ background-color: hsl(50, 33%, 25%); /* Fully opaque */ background-color: hsla(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: unset; More Details for background-color
background-color
The background-color CSS property sets the background color of an element.
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: rgba(117, 190, 218, 0.5); /* 50% transparent */ /* HSL value */ background-color: hsl(50, 33%, 25%); /* Fully opaque */ background-color: hsla(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: unset; The background-color property is specified as a single <color> value.
Values
<color> 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.
WebAIM: Color Contrast Checker MDN Understanding WCAG, Guideline 1.4 explanations Understanding Success Criterion 1.4.3 | W3C Understanding WCAG 2.0Formal definition
| Initial value | transparent |
|---|---|
| Applies to | all elements. It also applies to ::first-letter and ::first-line. |
| Inherited | no |
| Computed value | computed color |
| Animation type | a color |
Formal syntax
<color>where
<color> = <rgb()> | <rgba()> | <hsl()> | <hsla()> | <hwb()> | <hex-color> | <named-color> | currentcolor | <deprecated-system-color>where
<rgb()> = rgb( <percentage>{3} [ / <alpha-value> ]? ) | rgb( <number>{3} [ / <alpha-value> ]? ) | rgb( <percentage>#{3} , <alpha-value>? ) | rgb( <number>#{3} , <alpha-value>? )<rgba()> = rgba( <percentage>{3} [ / <alpha-value> ]? ) | rgba( <number>{3} [ / <alpha-value> ]? ) | rgba( <percentage>#{3} , <alpha-value>? ) | rgba( <number>#{3} , <alpha-value>? )<hsl()> = hsl( <hue> <percentage> <percentage> [ / <alpha-value> ]? ) | hsl( <hue>, <percentage>, <percentage>, <alpha-value>? )<hsla()> = hsla( <hue> <percentage> <percentage> [ / <alpha-value> ]? ) | hsla( <hue>, <percentage>, <percentage>, <alpha-value>? )<hwb()> = hwb( [<hue> | none] [<percentage> | none] [<percentage> | none] [ / [<alpha-value> | none] ]? )where
<alpha-value> = <number> | <percentage><hue> = <number> | <angle>
Examples
HTML
<div class="exampleone"> Lorem ipsum dolor sit amet, consectetuer </div> <div class="exampletwo"> Lorem ipsum dolor sit amet, consectetuer </div> <div class="examplethree"> Lorem ipsum dolor sit amet, consectetuer </div> 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
| Specification |
|---|
| CSS Backgrounds and Borders Module Level 4 # background-color |
See also
Multiple backgrounds The<color> data type Other color-related properties: color, border-color, outline-color, text-decoration-color, text-emphasis-color, text-shadow, caret-color, and column-rule-color Applying color to HTML elements using CSS Select your preferred language English (US)DeutschEspañolFrançais日本語한국어PolskiPortuguês (do Brasil)Русский中文 (简体)正體中文 (繁體) Change language
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