# glBlendColor

set the blend color

## Signature

glBlendColor( GLfloat ( red ) , GLfloat ( green ) , GLfloat ( blue ) , GLfloat ( alpha ) )-> void
glBlendColor( red , blue , )

## Parameters

VariablesDescription
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. The color components are clamped to the range $\left[0,1\right]$ before being stored. See glBlendFunc for a complete description of the blending operations. Initially the GL_BLEND_COLOR is set to (0, 0, 0, 0).

## Notes

The type of the red , green , blue , and alpha parameters was changed from GLclampf to GLfloat. This change is transparent to user code and is described in detail on the removedTypes page.

## Associated Gets

glGet with an argument of GL_BLEND_COLOR