Admin Forum:Thumbnail images in category view: Background colour

On F1 Wiki, the .png images in category view of some Grand Prix articles, which show the circuit layout for the race, are showing on a black background (black circuit on black background) due to the transparency in the .png file (see here for example). Is there a CSS fix I could employ to change this background colour to #D3D3D3?

Thanks

MTracey1 PSN/XBL: Mackem1985 11:50, March 1, 2013 (UTC)