.\"***************************************************************************
-.\" Copyright (c) 2017 Free Software Foundation, Inc. *
+.\" Copyright (c) 2017,2018 Free Software Foundation, Inc. *
.\" *
.\" Permission is hereby granted, free of charge, to any person obtaining a *
.\" copy of this software and associated documentation files (the *
.\" authorization. *
.\"***************************************************************************
.\"
-.\" $Id: user_caps.5,v 1.4 2017/11/25 20:13:12 tom Exp $
+.\" $Id: user_caps.5,v 1.6 2018/02/03 22:38:17 tom Exp $
.TH user_caps 5
.ie \n(.g .ds `` \(lq
.el .ds `` ``
explicitly list the number of bits used for red, green and blue components
as a slash-separated list of decimal integers.
.RE
+.IP
+Because there are several RGB encodings in use,
+applications which make assumptions about the number of bits per color
+are unlikely to work reliably.
+As a trivial case, for example, one could define \fBRGB#1\fP
+to represent the standard eight ANSI colors, i.e., one bit per color.
.TP 3
U8
\fIboolean\fP,