Visual Rules Cheat Sheet

Name Description Example
Font Size The font-size CSS property is used to set text sizes. Font size values can be many different units or types such as pixels. font-size: 30px;
Background Color The background-color CSS property controls the background color of elements. background-color: blue;
!important Rule The CSS !important rule is used on declarations to override any other declarations for a property and ignore selector specificity. !important rules will ensure that a specific declaration always applies to the matched elements. However, generally it is good to avoid using !important as bad practice. .post-title { color: blue !important; }
Opacity The opacity CSS property can be used to control the transparency of an element. The value of this property ranges from 0 (transparent) to 1 (opaque). opacity: 0.5;
Font Weight The font-weight CSS property can be used to set the weight (boldness) of text. The provided value can be a keyword such as bold or normal. font-weight: bold;
Text Align The text-align CSS property can be used to set the text alignment of inline contents. This property can be set to these values: left, right, or center. text-align: right;
CSS Rule Sets A CSS rule set contains one or more selectors and one or more declarations. The selector(s), which in this example is h1, points to an HTML element. The declaration(s), which in this example are color: blue and text-align: center style the element with a property and value. The rule set is the main building block of a CSS sheet. h1 { color: blue; text-align: center; }
Setting foreground text color in CSS Using the color property, foreground text color of an element can be set in CSS. The value can be a valid color name supported in CSS like green or blue. Also, 3 digit or 6 digit color code like #22f or #2a2aff can be used to set the color. p { color : #2a2aff ; } span { color : green ; }
Resource URLs In CSS, the url() function is used to wrap resource URLs. These can be applied to several properties such as the background-image. background-image: url("../resources/image.png");
Background Image The background-image CSS property sets the background image of an element. An image URL should be provided in the syntax url("moon.jpg") as the value of the property. background-image: url("nyan-cat.gif");
Font Family The font-family CSS property is used to specify the typeface in a rule set. Fonts must be available to the browser to display correctly, either on the computer or linked as a web font. If a font value is not available, browsers will display their default font. When using a multi-word font name, it is best practice to wrap them in quotes. h2 { font-family: Verdana; } #page-title { font-family: "Courier New"; }
Color Name Keywords Color name keywords can be used to set color property values for elements in CSS. h1 { color: aqua; } li { color: khaki; }