RGBHLS - Converts a color specification given in the Red, Green, Blue (RGB) color space to color values

       To  use RGBHLS or c_rgbhls, load the NCAR Graphics libraries ncarg, ncarg_gks, and ncarg_c, preferably in
       that order.

       The C-binding argument descriptions are the same as the FORTRAN argument descriptions.

       #include <ncarg/ncargC.h>

       void c_rgbhls (float r, float g, float b, float *h,
       float *l, float *s)

       Copyright (C) 1987-2009
       University Corporation for Atmospheric Research
       The use of this Software is governed by a License Agreement.

UNIX                                               March 1993                                     RGBHLS(3NCARG)

       R           (REAL,  input,  range  [0.,1.])  represents the red intensity component of the input point in
                   RGB color space.

       G           (REAL, input, range [0.,1.])  represents the green intensity component of the input point  in
                   RGB color space.

       B           (REAL,  input,  range [0.,1.])  represents the blue intensity component of the input point in
                   RGB color space.

       H           (REAL, output, range [0.,360.) ) represents the hue of the input point in HLS color space.  A
                   value of (0.,0.,B) in the input space will result in a hue of 0. in the output space.

       L           (REAL,  output,  range  [0.,100.])   represents the lightness value of the input point in HLS
                   color space.  Lightness is a measure of the quantity of light - a lightness of 0.  is  black,
                   and a lightness of 100.  gives white. The pure hues occur at lightness value 50.

       S           (REAL,  output,  range  [0.,100.])  represents the saturation value of the input point in HLS
                   color space.  Saturation is a measure of how much  white  light  is  mixed  with  the  color.
                   Saturation  values of 0.  represent grays (with a gray value equal to the lightness value L).
                   Saturation values of 100. are fully saturated colors. The hue is  undefined  when  S=0.   The
                   fully saturated pure hues occur when S=100. and L=50.  The saturation value should be thought
                   of as a percentage.

       Use the ncargex command to see the following relevant examples: tcolcv, fcce02.

       See the colconv man page for a description of all Colconv error messages and/or informational messages.

       RGBHLS - Converts a color specification given in the Red, Green, Blue (RGB) color space to color values
       in the Hue, Lightness, Saturation (HLS) color space.

       Online: colconv, hlsrgb, hsvrgb, rgbhsv, rgbyiq, yiqrgb, ncarg_cbind.

       Hardcopy: NCAR Graphics Fundamentals, UNIX Version

       CALL RGBHLS (R, G, B, H, L, S)