OpenGL State

State includes:

Color
Drawing style
Material properties
Light sources
Texture
Transformations

Example:

glColor3f(1, 1, 0)      # Set current color
glBegin(GL_TRIANGLES)

glVertex2f(0.0, 0.0)    # This triangle is yellow
glVertex2f(0.4, 0.0)
glVertex2f(0.8, 0.8)

glColor3f(1, 0, 1)      # Change current color
glVertex2f(0.0, 0.0)    # This triangle is magenta
glVertex2f(-0.4, 0.0)
glVertex2f(-0.8, -0.8)

glEnd()