Color keywords
Note: As of [CSS Color], the CSS2 System Color values have been deprecated in favor of the CSS3 UI ‘[appearance]’ property.
- ActiveBorder
Active window border.
- ActiveCaption
Active window caption.
- AppWorkspace
Background color of multiple document interface.
- Background
Desktop background.
- ButtonFace
The face background color for 3-D elements that appear 3-D due to one layer of surrounding border.
- ButtonHighlight
The color of the border facing the light source for 3-D elements that appear 3-D due to one layer of surrounding border.
- ButtonShadow
The color of the border away from the light source for 3-D elements that appear 3-D due to one layer of surrounding border.
- ButtonText
Text on push buttons.
- CaptionText
Text in caption, size box, and scrollbar arrow box.
- GrayText
Grayed (disabled) text. This color is set to #000 if the current display driver does not support a solid gray color.
- Highlight
Item(s) selected in a control.
- HighlightText
Text of item(s) selected in a control.
- InactiveBorder
Inactive window border.
- InactiveCaption
Inactive window caption.
- InactiveCaptionText
Color of text in an inactive caption.
- InfoBackground
Background color for tooltip controls.
- InfoText
Text color for tooltip controls.
- Menu
Menu background.
- MenuText
Text in menus.
- Scrollbar
Scroll bar gray area.
- ThreeDDarkShadow
The color of the darker (generally outer) of the two borders away from the light source for 3-D elements that appear 3-D due to two concentric layers of surrounding border.
- ThreeDFace
The face background color for 3-D elements that appear 3-D due to two concentric layers of surrounding border.
- ThreeDHighlight
The color of the lighter (generally outer) of the two borders facing the light source for 3-D elements that appear 3-D due to two concentric layers of surrounding border.
- ThreeDLightShadow
The color of the darker (generally inner) of the two borders facing the light source for 3-D elements that appear 3-D due to two concentric layers of surrounding border.
- ThreeDShadow
The color of the lighter (generally inner) of the two borders away from the light source for 3-D elements that appear 3-D due to two concentric layers of surrounding border.
- Window
Window background.
- WindowFrame
Window frame.
- WindowText
Text in windows.
CSS Legal Color Values
Colors in CSS can be specified by the following methods:
- Hexadecimal colors
- Hexadecimal colors with transparency
- RGB colors
- RGBA colors
- HSL colors
- HSLA colors
- Predefined/Cross-browser color names
- With the currentcolor keyword
Hexadecimal Colors
A hexadecimal color is specified with: #RRGGBB, where the RR (red), GG (green) and BB (blue) hexadecimal integers specify the components of the color. All values must be between 00 and FF.
For example, the #0000ff value is rendered as blue, because the blue component is set to its highest value (ff) and the others are set to 00.
Example
Define different HEX colors:
Hexadecimal Colors With Transparency
A hexadecimal color is specified with: #RRGGBB. To add transparency, add two additional digits between 00 and FF.
Example
Define different HEX colors with transparency:
RGB Colors
An RGB color value is specified with the rgb() function, which has the following syntax:
Each parameter (red, green, and blue) defines the intensity of the color and can be an integer between 0 and 255 or a percentage value (from 0% to 100%).
For example, the rgb(0,0,255) value is rendered as blue, because the blue parameter is set to its highest value (255) and the others are set to 0.
Also, the following values define equal color: rgb(0,0,255) and rgb(0%,0%,100%).
Example
Define different RGB colors:
RGBA Colors
RGBA color values are an extension of RGB color values with an alpha channel — which specifies the opacity of the object.
An RGBA color is specified with the rgba() function, which has the following syntax:
The alpha parameter is a number between 0.0 (fully transparent) and 1.0 (fully opaque).
Example
Define different RGB colors with opacity:
HSL Colors
HSL stands for hue, saturation, and lightness — and represents a cylindrical-coordinate representation of colors.
An HSL color value is specified with the hsl() function, which has the following syntax:
hsl(hue, saturation, lightness)
Hue is a degree on the color wheel (from 0 to 360) — 0 (or 360) is red, 120 is green, 240 is blue. Saturation is a percentage value; 0% means a shade of gray and 100% is the full color. Lightness is also a percentage; 0% is black, 100% is white.
Example
Define different HSL colors:
HSLA Colors
HSLA color values are an extension of HSL color values with an alpha channel — which specifies the opacity of the object.
An HSLA color value is specified with the hsla() function, which has the following syntax:
hsla(hue, saturation, lightness, alpha)
The alpha parameter is a number between 0.0 (fully transparent) and 1.0 (fully opaque).
Example
Define different HSL colors with opacity:
Predefined/Cross-browser Color Names
140 color names are predefined in the HTML and CSS color specification.
For example: blue , red , coral , brown , etc:
Example
Define different color names:
A list of all predefined names can be found in our Color Names Reference.
The currentcolor Keyword
The currentcolor keyword refers to the value of the color property of an element.
Example
The border color of the following element will be blue, because the text color of the element is blue: