100 – Thin
200 – Extra Light (Ultra Light)
300 – Light
400 – Normal (Regular)
500 – Medium
600 – Semi Bold (Demi Bold)
700 – Bold
800 – Extra Bold (Ultra Bold)
900 – Black (Heavy)
font-weight: 100;
font-weight: 200;
font-weight: 300;
font-weight: 400; /* normal */
font-weight: 500;
font-weight: 600;
font-weight: 700; /* bold */
font-weight: 800;
font-weight: 900;