CSS FONT-WEIGHT

If you want to control the weight of your font ( its thickness ), using font weight is the best way to go about it. We suggest that you only use font-weight in multiples of 100 (e.g. 200, 300, etc) because any less and you probably will not see any difference. The values range from 100(thin)-900(thick).

Example
p {font-weight: bold}
Possible Values
Value Description
normal Defines normal characters
bold Defines thick characters
bolder Defines thicker characters
lighter Defines lighter characters
100

200

300

400

500

600

700

800

900

Defines from thin to thick characters. 400 is the same as normal, and