Pure blue, in the middle, has a wavelength of 470 nanometres. In painting and traditional colour theory, blue is one of the three primary colours of pigments, along with red and yellow, which can be mixed to form a wide gamut of colours.
Endowed with significant natural resources, including ample fertile land, regular rainfall, and mineral deposits, it is thought that Uganda could feed all of Africa if it were commercially farmed. The economy of Uganda has great potential, and it appeared poised for rapid economic growth and development.gricultural products supply nearly all of Uganda's foreign exchange earnings, with coffee alone (of which Uganda is Africa's leading producer) accounting for about 27% of the country's exports in 2002.
Guyana has a rich and potentially very productive agriculture sector that can make major contributions to the recovery of the economy. There is scope for expansion, as a considerable amount of suitable land is currently not being cultivated. Guyana is mostly self-sufficient in food. The main agricultural exports are sugar, rice, and shrimp. Sugar production has risen from 162,573 metric tons in 1991 to 280,066 metric tons in 1996. Approximately 255,655 metric tons of sugar were produced in 1998 despite the severe drought.