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-rw-r--r--doc/user/bgr_colo6
1 files changed, 5 insertions, 1 deletions
diff --git a/doc/user/bgr_colo b/doc/user/bgr_colo
index 4a48fb9..08d8d2a 100644
--- a/doc/user/bgr_colo
+++ b/doc/user/bgr_colo
@@ -44,5 +44,9 @@ nominal colour can look quite different on screen and on paper. The
standard Lout @Code "@SetColour" symbol can provide many more colours
setcolour. @Index @Code "@SetColour"
@Cite { $kingston1995lout.expert}, although they must be specified
-using numbers rather than names.
+using numbers rather than names. For example,
+@ID @Code "{ 0.5 0.5 1.0 } @SetColour Hello"
+prints @Code Hello in a colour containing red at intensity 0.5, green
+at intensity 0.5, and blue at intensity 1.0, which turns out, in the
+strange world of colour coordinates, to be a light blue.
@End @Section