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# docs.GL

OpenGL 4
OpenGL 3
OpenGL 2
OpenGL ES 3
OpenGL ES 2

# glBlendColor

## Name

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

| OpenGL ES API Version
--- | ---
Function Name | 2.0 | 3.0 | 3.1
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 https://web.archive.org/web/20171022161616/http://oss.sgi.com/projects/FreeB/.

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