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-rw-r--r--doc/lua_api.txt6
1 files changed, 6 insertions, 0 deletions
diff --git a/doc/lua_api.txt b/doc/lua_api.txt
index ff2143cc8..698efbe8a 100644
--- a/doc/lua_api.txt
+++ b/doc/lua_api.txt
@@ -1265,6 +1265,12 @@ ColorString
#RRGGBBAA
^ defines a color in hexadecimal format and alpha channel
+Named colors are also supported and are equivalent to "CSS Color Module Level 4"
+(http://dev.w3.org/csswg/css-color/#named-colors). To specify the value of the
+alpha channel, append #AA to the end of the color name (e.g. colorname#08). For
+named colors the hexadecimal string representing the alpha value must (always)
+be two hexadecimal digits.
+
Vector helpers
---------------
vector.new([x[, y, z]]) -> vector