Google
CSS Font-Weight Property

Description:
Specifies the weight of the font.
Syntax:
font-weight: [value];
Possible Values:
  • normal
  • bold
  • bolder
  • lighter
  • 100
  • 200
  • 300
  • 400
  • 500
  • 600
  • 700
  • 800
  • 900
  • inherit
Initial Value:
Normal
Applies To:
All elements
Inherited:
Yes
Media:
Visual
Example:
p.new {font-weight: 400;}

p.old {font-weight: lighter;}