1991-2006
Silicon Graphics, Inc.
2010-2014
Khronos Group
glBlendColor
3G

# glBlendColor

set the blend color

## C Specification

                    void glBlendColor
                    GLfloat red
                    GLfloat green
                    GLfloat blue
                    GLfloat alpha

## Parameters

`red`
`green`
`blue`
`alpha`

  specify the components of `GL_BLEND_COLOR`

## Description

The `GL_BLEND_COLOR` may be used to calculate the source and destination blending factors. If destination framebuffer components use an unsigned normalized fixed-point representation, the constant color components are clamped to the range 0 1 when computing the blend factors. See glBlendFunc for a complete description of the blending operations. Initially the `GL_BLEND_COLOR` is set to (0, 0, 0, 0).

## Associated Gets

glGet with an argument of `GL_BLEND_COLOR`

## API Version Support

glBlendColor

## See Also

glBlendEquation, glBlendFunc, glGet

## Copyright

Copyright 1991-2006 Silicon Graphics, Inc. Copyright 2010-2014 Khronos Group. This document is licensed under the SGI Free Software B License. For details, see http://oss.sgi.com/projects/FreeB/.