CSS Values and Units

• Length
  em, pt, ex, mm, cm, in, px
  e.g. 1.0em
• Percentage
  e.g. 10%
• URL
  url(url goes here)
  e.g. url('../images/banner.png')
• Color
  name, hexadecimal, rgb value
  e.g.
  • name
    • aqua
  • hexadecimal
    • #ffffdd
    • #60ae9f
  • rgb (percent or numeric)
    • rgb(24,50,255)
    • rgb(5%,20%,75%)