Brussels: Christian Louboutin's battle to protect the distinctive red soles on the shoes he designs got a boost on Tuesday when the EU's top court said their red colour was separate from the shape of the soles, which is usually not protected under EU trademark law.

The judges at the Court of Justice of the EU did not follow the advice of the advocate general who said in February that the red colour could not be considered as being separate from the shape of the sole.

"The mark does not relate to a specific shape of sole for high-heeled shoes since the description of that mark explicitly states that the contour of the shoe does not form part of the mark and is intended purely to show the positioning of the red colour covered by the registration," the ECJ said in a statement.

The French designer went to court in The Netherlands to prevent the Dutch high street chain Van Haren from selling its own versions of red-soled high-heeled shoes, a favourite on celebrity red carpets.

A Dutch court had asked the ECJ if the prohibition on the registration of shapes as trademarks also applied to shapes combining three-dimensional properties of a product and other characteristics such as colours.

Louboutin, founded in 1991, claimed victory and welcomed the ruling.

"The protection of Christian Louboutin's red sole trademark is strengthened by the European Court of Justice," Louboutin said in a statement. Reuters