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-rw-r--r--info/blueshift.texinfo3
1 files changed, 2 insertions, 1 deletions
diff --git a/info/blueshift.texinfo b/info/blueshift.texinfo
index 70e7fa0..94b061e 100644
--- a/info/blueshift.texinfo
+++ b/info/blueshift.texinfo
@@ -645,7 +645,8 @@ Input and output is one colour instance.
If you want to calculated the distance (difference)
between two colours, you can use @code{delta_e}. It
has two parameters, each is red–green–blue-tuple of
-an sRGB colour.
+an sRGB colour. The just notice difference is circa
+2,3.
@node Preexisting adjustments