---
name: "glutGetColor"
section: "3"
platform: "linux"
package: "freeglut"
version: "3.8.0-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/glutGetColor"
---

# glutGetColor(3)

retrieves a red, green, or blue component for a given color index colormap entry for the layer in use's logical colormap for the current window.

## NAME

glutGetColor - retrieves a red, green, or blue component for a given color index colormap entry for the layer in use's logical colormap for the current window.

## SYNTAX

```

```

GLfloat glutGetColor(int cell, int component);

## ARGUMENTS

- *cell*

  Color cell index (starting at zero).

- *component*

  One of GLUT\_RED, GLUT\_GREEN, or GLUT\_BLUE.

## DESCRIPTION

glutGetColor retrieves a red, green, or blue component for a given color index colormap entry for the current window's logical colormap. The current window should be a color index window. cell should be zero or greater and less than the total number of colormap entries for the window. For valid color indices, the value returned is a floating point value between 0.0 and 1.0 inclusive. glutGetColor will return -1.0 if the color index specified is an overlay's transparent index, less than zero, or greater or equal to the value returned by glutGet(GLUT\_WINDOW\_COLORMAP\_SIZE), that is if the color index is transparent or outside the valid range of color indices.

## SEE ALSO

glutGet, glutSetColor, glutCopyColormap

## AUTHOR

Mark J. Kilgard (mjk@nvidia.com)