Definicija: A model that augments the red, green, blue (RGB) method of combining colors in light-based media, with a fourth color component, alpha, which is used to control color blending. In Open GL, an alpha value of 1.0 corresponds to complete opacity and a value of 0.0 corresponds to complete transparency.

Definicija: the world's most comprehensive inventory of the global conservation status of biological species

Definicija: obsega niz publikacij, ki jih izdaja Mednarodna zveza za ohranjanje narave; je objektiven popis ogroženih rastlinskih in živalskih vrst

Definicija: A binary search tree which uses a one-bit flag on each node to identify the node by color: either red or black. A set of constraints on node color helps form an approximately balanced binary tree.