A hexadecimal color is specified with: #RRGGBB, where the RR (red), GG (green) and BB (blue) hexadecimal integers specify the components of the color.
HEX Color Values
In HTML, a color can be specified using a hexadecimal value in the form:
#rrggbb
Where rr (red), gg (green) and bb (blue) are hexadecimal values between 00 and ff (same as decimal 0-255).
For example, #ff0000 is displayed as red, because red is set to its highest value (ff), and the other two (green and blue) are set to 00.
Another example, #00ff00 is displayed as green, because green is set to its highest value (ff), and the other two (red and blue) are set to 00.
To display black, set all color parameters to 00, like this: #000000.
To display white, set all color parameters to ff, like this: #ffffff.
Experiment by mixing the HEX values below:
RED
GREEN
BLUE
Example
<div class="w3-row w3-center" style="line-height:80px;color:white;font-size:20px;font-weight:bold;font-family:Consolas, 'Courier New', Courier, monospace">
<div class="w3-col m6 w3-padding">
<div style="background-color:#ff0000;">#ff0000</div>
</div>
<div class="w3-col m6 w3-padding">
<div style="background-color:#0000ff;">#0000ff</div>
</div>
<div class="w3-col m6 w3-padding">
<div style="background-color:#3cb371;">#3cb371</div>
</div>
<div class="w3-col m6 w3-padding">
<div style="background-color:#ee82ee;">#ee82ee</div>
</div>
<div class="w3-col m6 w3-padding">
<div style="background-color:#ffa500;">#ffa500</div>
</div>
<div class="w3-col m6 w3-padding">
<div style="background-color:#6a5acd;">#6a5acd</div>
</div>
</div>
Shades of Gray
Shades of gray are often defined using equal values for all three parameters:
Example
<div class="w3-row w3-center" style="line-height:80px;color:white;font-size:20px;font-weight:bold;font-family:Consolas, 'Courier New', Courier, monospace">
<div class="w3-col m6 w3-padding">
<div style="background-color:#404040;">#404040</div>
</div>
<div class="w3-col m6 w3-padding">
<div style="background-color:#686868;">#686868</div>
</div>
<div class="w3-col m6 w3-padding">
<div style="background-color:#A0A0A0;">#a0a0a0</div>
</div>
<div class="w3-col m6 w3-padding">
<div style="background-color:#BEBEBE;">#bebebe</div>
</div>
<div class="w3-col m6 w3-padding">
<div style="background-color:#dcdcdc;color:#555555">#dcdcdc</div>
</div>
<div class="w3-col m6 w3-padding">
<div style="background-color:#f8f8f8;color:#555555">#f8f8f8</div>
</div>
</div>
HEXA Value
HEXA color values are an extension of HEX color values with an alpha channel - which specifies the opacity for a color.
A HEXA color value is specified with:
#rrggbbaa
The alpha parameter is a value between 00 (fully transparent) and FF (not transparent at all). The value 80 indicates 50% opacity:
Example
<div class="w3-row w3-center" style="line-height:80px;color:white;font-size:20px;font-weight:bold;font-family:Consolas, 'Courier New', Courier, monospace">
<div class="w3-col m6 w3-padding">
<div style="background-color:#ff000080;">#ff000080</div>
</div>
<div class="w3-col m6 w3-padding">
<div style="background-color:#0000ff80;">#0000ff80</div>
</div>
<div class="w3-col m6 w3-padding">
<div style="background-color:#3cb37180;">#3cb37180</div>
</div>
<div class="w3-col m6 w3-padding">
<div style="background-color:#ee82ee80;">#ee82ee80</div>
</div>
<div class="w3-col m6 w3-padding">
<div style="background-color:#ffa50080;">#ffa50080</div>
</div>
<div class="w3-col m6 w3-padding">
<div style="background-color:#6a5acd80;">#6a5acd80</div>
</div>
</div>
Here are some common opacity percentages and their exact 2-digit HEX values:
- 100% - FF (not transparent at all)
- 90% - E6
- 80% - CC
- 70% - B3
- 60% - 99
- 50% - 80
- 40% - 66
- 30% - 4D
- 20% - 33
- 10% - 1A
- 0% - 00 (fully transparent)