discrete colour palette used in Google Ngram, Google Trends and probably elsewhere (12 classes)

google.css

a { color: #264EC0; }
b { color: #D22310; }
c { color: #FC8608; }
d { color: #168713; }
e { color: #850086; }
f { color: #1086B9; }
g { color: #D22B63; }
h { color: #559D05; }
i { color: #A71B23; }
j { color: #21436F; }
k { color: #852D86; }
l { color: #219B86; }