diff --git a/include/wx/qt/colour.h b/include/wx/qt/colour.h
index b7f5755ff9..9652fa8d8f 100644
--- a/include/wx/qt/colour.h
+++ b/include/wx/qt/colour.h
@@ -18,12 +18,12 @@ public:
     DEFINE_STD_WXCOLOUR_CONSTRUCTORS
     wxColour(const QColor& color);
 
-    virtual bool IsOk() const;
+    virtual bool IsOk() const { return valid; }
 
-    unsigned char Red() const;
-    unsigned char Green() const;
-    unsigned char Blue()  const;
-    unsigned char Alpha() const;
+    ChannelType Red() const   { return m_red;   }
+    ChannelType Green() const { return m_green; }
+    ChannelType Blue()  const { return m_blue;  }
+    ChannelType Alpha() const { return m_alpha; }
 
     bool operator==(const wxColour& color) const;
     bool operator!=(const wxColour& color) const;
@@ -37,7 +37,7 @@ protected:
     virtual void InitRGBA(ChannelType r, ChannelType g, ChannelType b, ChannelType a);
 
 private:
-    unsigned char red, green, blue, alpha;
+    ChannelType m_red, m_green, m_blue, m_alpha;
     bool valid;
 
     wxDECLARE_DYNAMIC_CLASS(wxColour);
diff --git a/src/qt/colour.cpp b/src/qt/colour.cpp
index de42a7a26a..7b6fbd3294 100644
--- a/src/qt/colour.cpp
+++ b/src/qt/colour.cpp
@@ -28,16 +28,9 @@ wxColour::wxColour(const QColor& color)
     InitRGBA(color.red(), color.green(), color.blue(), color.alpha());
 }
 
-bool wxColour::IsOk() const { return valid; }
-
-unsigned char wxColour::Red() const { return red;   }
-unsigned char wxColour::Green() const { return green; }
-unsigned char wxColour::Blue()  const { return blue;  }
-unsigned char wxColour::Alpha() const { return alpha; }
-
 bool wxColour::operator==(const wxColour& color) const
 {
-    return red == color.red && green == color.green && blue == color.blue && alpha == color.alpha;
+    return m_red == color.m_red && m_green == color.m_green && m_blue == color.m_blue && m_alpha == color.m_alpha;
 }
 
 bool wxColour::operator!=(const wxColour& color) const
@@ -54,17 +47,18 @@ int wxColour::GetPixel() const
 QColor wxColour::GetQColor() const
 {
     if( valid )
-        return QColor(red, green, blue, alpha);
+        return QColor(m_red, m_green, m_blue, m_alpha);
     return QColor();
 }
 
 void wxColour::Init()
 {
+    m_red = m_green = m_blue = m_alpha = 0;
     valid = false;
 }
 
 void wxColour::InitRGBA(ChannelType r, ChannelType g, ChannelType b, ChannelType a)
 {
-    red = r, green = g, blue = b, alpha = a;
+    m_red = r, m_green = g, m_blue = b, m_alpha = a;
     valid = true;
 }