Map of the cantons of Switzerland, with the cantons shaded by the party that won the most votes in the 2011 election to the National Council.
Orange (#DB8300) = Christian Democratic People's Party (CVP/PDC)
Green (#006400) = Swiss People's Party (SVP/UDC)
Blue (#007AD2) = FDP.The Liberals (FDP/PLR)
Red (#CC0000) = Social Democratic Party (SP/PS)
Yellow (#FBD81B) = Conservative Democratic Party (BDP/PBD)
Turquoise (#006400) = Christian Social Party Obwalden (CSP OW)

Colours are the standardised colours used on English Wikipedia.
Own work
Bastin