There are 8 standard colours to choose from as follows in this press release from Valtra,
Valtra will introduce a new range of colour options for summer 2005. The new colours have been chosen according to customer feedback and contemporary trends. The new colour range consists of red, green, blue, metallic red, metallic green, metallic blue, silver and yellow. At the same time some colour shades will be slightly changed; for example, the red will change from tomato-red to a brighter red that is closer to the original colour used on Volvo BM and Valmet tractors.
and some pictures of the colours here......
http://press.valtra.com/main/articles/pic/1327_1.jpg
http://www.valtra.co.uk/Products/unique/1_2.htm