diff --git a/docs/source/reference/modding/settings/GUI.rst b/docs/source/reference/modding/settings/GUI.rst
index 08ca23c7d1..118fd19212 100644
--- a/docs/source/reference/modding/settings/GUI.rst
+++ b/docs/source/reference/modding/settings/GUI.rst
@@ -148,8 +148,8 @@ color topic specific
 --------------------
 
 :Type:		RGBA floating point
-:Range:		0.0 to 1.0
-:Default:	empty
+:Range:		0.0 to 1.0 for each channel
+:Default:	0.45 0.5 0.8 1 (blue)
 
 This setting overrides the colour of dialogue topics that have a response unique to the actors speaking.
 The value is composed of four floating point values representing the red, green, blue and alpha channels.
@@ -161,8 +161,8 @@ color topic specific over
 -------------------------
 
 :Type:		RGBA floating point
-:Range:		0.0 to 1.0
-:Default:	empty
+:Range:		0.0 to 1.0 for each channel
+:Default:	0.6 0.6 0.85 1 (blue)
 
 This setting provides an "over" colour to dialogue topics that meet the color topic specific criteria.
 The value is composed of four floating point values representing the red, green, blue and alpha channels.
@@ -174,8 +174,8 @@ color topic specific pressed
 ----------------------------
 
 :Type:		RGBA floating point
-:Range:		0.0 to 1.0
-:Default:	empty
+:Range:		0.0 to 1.0 for each channel
+:Default:	0.3 0.35 0.75 1 (blue)
 
 This setting provides an "pressed" colour to dialogue topics that meet the color topic specific criteria.
 The value is composed of four floating point values representing the red, green, blue and alpha channels.
@@ -187,8 +187,8 @@ color topic exhausted
 ---------------------
 
 :Type:		RGBA floating point
-:Range:		0.0 to 1.0
-:Default:	empty
+:Range:		0.0 to 1.0 for each channel
+:Default:	0.3 0.3 0.3 1 (grey)
 
 This setting overrides the colour of dialogue topics which have been "exhausted" by the player.
 The value is composed of four floating point values representing the red, green, blue and alpha channels.
@@ -200,8 +200,8 @@ color topic exhausted over
 --------------------------
 
 :Type:		RGBA floating point
-:Range:		0.0 to 1.0
-:Default:	empty
+:Range:		0.0 to 1.0 for each channel
+:Default:	0.55 0.55 0.55 1 (grey)
 
 This setting provides an "over" colour to dialogue topics that meet the color topic exhausted criteria.
 The value is composed of four floating point values representing the red, green, blue and alpha channels.
@@ -213,10 +213,10 @@ color topic exhausted pressed
 -----------------------------
 
 :Type:		RGBA floating point
-:Range:		0.0 to 1.0
-:Default:	empty
+:Range:		0.0 to 1.0 for each channel
+:Default:	0.45 0.45 0.45 1 (grey)
 
-This setting provides an "pressed" colour to dialogue topics that meet the color topic exhausted criteria.
+This setting provides a "pressed" colour to dialogue topics that meet the color topic exhausted criteria.
 The value is composed of four floating point values representing the red, green, blue and alpha channels.
 The alpha value is currently ignored.
 
diff --git a/files/settings-default.cfg b/files/settings-default.cfg
index df14ef0634..1fa9db2640 100644
--- a/files/settings-default.cfg
+++ b/files/settings-default.cfg
@@ -218,18 +218,14 @@ keyboard navigation = true
 color topic enable = false
 
 # The color of dialogue topic keywords that gives unique actor responses
-# Format R G B A or empty for no special formatting
-# Default to blue
 color topic specific = 0.45 0.5 0.8 1
 color topic specific over = 0.6 0.6 0.85 1
 color topic specific pressed = 0.3 0.35 0.75 1
 
 # The color of dialogue topic keywords that gives already read responses
-# Format R G B A or empty for no special formatting
-# Default to grey
 color topic exhausted = 0.3 0.3 0.3 1
 color topic exhausted over = 0.55 0.55 0.55 1
-color topic exhausted pressed= 0.45 0.45 0.45 1
+color topic exhausted pressed = 0.45 0.45 0.45 1
 
 [HUD]