diff --git a/doc/type/color_choice.txt b/doc/type/color_choice.txt
index 7547e05d..d5742a9c 100644
--- a/doc/type/color_choice.txt
+++ b/doc/type/color_choice.txt
@@ -3,9 +3,9 @@ Data type: choice for a color field
 A possible choice for a color [[type:field]].
 
 --Properties--
-! Property	Type		Description
-| @name@	[[type:string]]	Name of this choice, displayed in the drop down list.
-| @color@	[[type:color]]	Color this choice corresponds with.
+! Property	Type			Description
+| @name@	[[type:string]]		Name of this choice, displayed in the drop down list.
+| @color@	opaque [[type:color]]	Color this choice corresponds with.
 
 --Example--
 >choice:
diff --git a/doc/type/field.txt b/doc/type/field.txt
index e2a603a3..cdd1564f 100644
--- a/doc/type/field.txt
+++ b/doc/type/field.txt
@@ -69,8 +69,8 @@ Additional properties are available, depending on the type of field:
 | ^^^		@initial@	[[type:string]]		 	Initial value for new values for this field.
 | ^^^		@default name@	[[type:string]]	@"Default"@	Name of the default state.
 | ^^^		@choices@	[[type:list]] of [[type:choice]]s	 	Possible values for this field.
-| ^^^		@choice colors@	[[type:map]] of [[type:color]]s		 	Colors of the choices for statistics graphs.
-| ^^^		@choice colors cardlist@	[[type:map]] of [[type:color]]s		 	Colors of the choices for lines in the card list,<br/> see also the @card list color script@ property of [[type:game]]s.
+| ^^^		@choice colors@	[[type:map]] of opaque [[type:color]]s	 	Colors of the choices for statistics graphs.
+| ^^^		@choice colors cardlist@	[[type:map]] of opaque [[type:color]]s	 	Colors of the choices for lines in the card list,<br/> see also the @card list color script@ property of [[type:game]]s.
 	
 | @"multiple choice"@	 	<<<	<<<	<<<
 		'' Multiple choice fields have the same attributes as normal choice fields.''<br/>
diff --git a/doc/type/statistics_dimension.txt b/doc/type/statistics_dimension.txt
index d6334649..fcd90db4 100644
--- a/doc/type/statistics_dimension.txt
+++ b/doc/type/statistics_dimension.txt
@@ -20,7 +20,7 @@ Categories are also automatically generated from dimensions.
 | @numeric@		[[type:boolean]]	@false@		Is the value always a number?
 | @show empty@		[[type:boolean]]	@false@		Should cards with the value @""@ be included?
 | @split list@		[[type:boolean]]	@false@		Indicates the value is a list of the form @"item1, item2"@. The card is put under both items.
-| @colors@		[[type:map]] of [[type:color]]s		 	Colors to use for specific values
+| @colors@		[[type:map]] of opaque [[type:color]]s	 	Colors to use for specific values
 | @groups@		[[type:list]] of [[type:string]]s	 	Values to always show, and the order to show them in.
 
 --Example--
diff --git a/doc/type/style.txt b/doc/type/style.txt
index f1738505..293e30c0 100644
--- a/doc/type/style.txt
+++ b/doc/type/style.txt
@@ -159,7 +159,7 @@ The rest of the properties depend on the type of [[type:field]] this style is fo
 | ^^^		@padding right@		^^^			^^^		^^^
 | ^^^		@padding top@		^^^			^^^		^^^
 | ^^^		@padding bottom@	^^^			^^^		^^^
-| ^^^		@background color@	[[type:color]]		@rgb(255,255,255)@	Background color for the box, can be used to make it stand out.
+| ^^^		@background color@	opaque [[type:color]]	@rgb(255,255,255)@	Background color for the box, can be used to make it stand out.
 
 --Example--
 
diff --git a/doc/type/value.txt b/doc/type/value.txt
index 50c2f004..508756b1 100644
--- a/doc/type/value.txt
+++ b/doc/type/value.txt
@@ -22,7 +22,7 @@ The type of a value depends on the corresponding field:
 | @"image"@		[[type:filename]]		Filename of an image file in the [[type:set]] package.
 | @"symbol"@		[[type:filename]]		Filename of a [[type:symbol]] file in the [[type:set]] package.<br/>
 			 				When accessed from a script, image fields can be directly used as [[type:image]]s.
-| @"color"@		[[type:color]]			A color.
+| @"color"@		opaque [[type:color]]		A color.
 | @"info"@		[[type:string]]			A label for the information box.
 
 --Example--