.TH ppmgrad 1 "5 April 1994"
.IX ppmgrad
.SH NAME
ppmgrad - blends one or more colors along a vertical scale.
.SH SYNOPSIS
.B ppmgrad
.I [-sin] width height color1 ... [color10]
.SH DESCRIPTION
Produces a portable pixmap of the specified width, height, with a gradient blending one color into the next.  A maximum of ten colors can be specified.  By default, blending is done along a linear ramp.  The 
.B -sin
option blends colors along a sinusoidal ramp.
.IX "generating pixmaps"
.PP
The colors can be specified in five ways:
.IX "specifying colors"
.TP 
o
A name, assuming
that a pointer to an X11-style color names file was compiled in.
.TP 
o
An X11-style hexadecimal specifier: rgb:r/g/b, where r g and b are
each 1- to 4-digit hexadecimal numbers.
.TP 
o
An X11-style decimal specifier: rgbi:r/g/b, where r g and b are
floating point numbers between 0 and 1.
.TP 
o
For backwards compatibility, an old-X11-style hexadecimal
number: #rgb, #rrggbb, #rrrgggbbb, or #rrrrggggbbbb.
.TP 
o
For backwards compatibility, a triplet of numbers
separated by commas: r,g,b, where r g and b are
floating point numbers between 0 and 1.
(This style was added before MIT came up with the similar rgbi style.)
.SH "SEE ALSO"
ppm(5), ppmmake(1)
.SH AUTHOR
Copyright (C) 1994 by Gerald Combs.
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