glClearColor - specify clear values for the color buffers

glGet() with argument GL_COLOR_CLEAR_VALUE

voidglClearColor(GLfloatred,GLfloatgreen,GLfloatblue,GLfloatalpha);

       Copyright © 1991-2006 Silicon Graphics, Inc.
       Copyright © 2010-2014 Khronos Group

[FIXME: source]                                    11/18/2024                                   GLCLEARCOLOR(3G)

glClearColor specifies the red, green, blue, and alpha values used by glClear() to clear the color
       buffers. Values specified by glClearColor are clamped to the range 0 1.

       glClearColor - specify clear values for the color buffers

       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.

red, green, blue, alpha
           Specify the red, green, blue, and alpha values used when the color buffers are cleared. The initial
           values are all 0.

glClear(), removedTypes()

       ┌──────────────┬───────────────────────────────────────────────────────────────────────┐
       │              │                OpenGLVersion                                         │
       ├──────────────┼─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┤
       │ Function     │ 2.0 │ 2.1 │ 3.0 │ 3.1 │ 3.2 │ 3.3 │ 4.0 │ 4.1 │ 4.2 │ 4.3 │ 4.4 │ 4.5 │
       │ /            │     │     │     │     │     │     │     │     │     │     │     │     │
       │ Feature      │     │     │     │     │     │     │     │     │     │     │     │     │
       │ Name         │     │     │     │     │     │     │     │     │     │     │     │     │
       ├──────────────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┤
       │ glClearColor │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │
       └──────────────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┘