Below is a list of useful selectors compiled by Digital Fellow Patick Smyth. There are also CSS cheatsheets available online.
Determines text color. Can be a word or a hex value, like #FFFFFF:
color: blue;
color: #000000;
Sets the background color of an element.
background-color: pink
background-color: #F601F6;
Aligns text to the left, center, or right.
text-align: center;
The space between text and the "box" (<div>) surrounding it.
padding: 10px;
padding-right: 10px
The space between an element's box and the next element (or the edge of the page).
margin: 10px;
margin-top: 10px;
Sets the width or height of an element. Typically, don't set both of these.
width: 50%;
height: 40px;
Determines if text wraps around an element.
float: left;
Determines if an element is treated as a block or inline element. Can also be set to none, which makes the element disappear.
display: inline;
display: block;
display: none;
Determines default styling on lists. Usually best to set it to none.
list-style-type: none;
Sets the font. Usually best to copy this from Google Fonts or another web font repository.
font-family: 'Lato', sans-serif;