Update 13

Some common CSS attributes for HTML5

This list includes some very common CSS properties. It is not intended to be complete. In many cases the list of posible values is also incomplete. Some properties can be used with additional tags.

Commonly used with body, div, and table tags

Commonly used with p, span, div, h1...h6, body, and table tags

Commonly used with ordered and unordered lists

Commonly used with img and div tags

Used to make the text wrap around the image or division

Centering items

Box properties: margins, padding and borders

These apply to all elements and are commonly used with div (divisions), paragraphs, lists and headers, for example. They apply to the "box" containing the element.

CSS used for this div
float: right;
background-color: #CCCCCC;
margin: 20px;
padding: 10px;
border-width: 10px;
border-style: outset;
border-color: red

widthValues number values for margin, padding and border-width are commonly set in px (pixels), in (inches), cm (centimeters) or percents. The above listing is short. One can control the top, right side, bottom, and left side of the box independently using -top, -right, -bottom, -left following the words margin, padding, or border.


When formatting tables, you typically define CSS for the <table>, <tr>, <th>, <td>, and <caption> tags as needed. The following properties discussed above may be useful: border, width, height, text-align, padding, background-color, color, margin-left: auto, and margin-right: auto, for example, are often useful. Important Some browsers require using HTML5 and start with the tag <!DOCTYPE html>. Some special properties:

The CSS code used for tables in this page
TagCentered aqua tablesThis table
<table>border-collapse: collapse;
border: 1px solid black;
background-color: aqua;
margin-left: auto;
margin-right: auto;
border: 1px solid red;
width: 600px
<tr>  (white rows)
color: black; background-color: white
(light gray rows)
color: blue; background-color: #CCCCCC
<th> (same as for <td>) color: white;
background-color: #606060
<td>border: 1px solid black;
padding: 5p
border: 1px solid red;
<caption> caption-side: bottom

CSS measurement units

UnitDescription UnitDescription  UnitDescription
mmmillimeteremcurrent font sizeexheight of x
ptpointpcpica (12 pts)pxpixel

Changing hyperlink colors

Three ways to use CSS

  1. style tag: Example:
    <style  type="text/css">
        body {background-color: #ffffcc;
            ... }
        p.center {text-align:center}
        .special {color: blue}
    <p class="special">   
  2. in-line: Example:
    <body style="background-color: #ffffcc"; ... >
    <p style="text-align:center">
  3. external: Example:
    <link rel="stylesheet" type="text/css" href="filename.css"> 

View this page using CSS
View this page without any CSS
You may want to view the source file to see the CSS used in this file.

These files are exactly the same except the <style> tag in the head section was removed in the "without" page.

Maintained by brinkje@plu.edu
Updated Nov. 25, 2013

Passed HTML5 check on 11/25/13   Valid CSS!