diff --git a/src/SciCall.h b/src/SciCall.h
index ced506e88..01f7b2bbd 100644
--- a/src/SciCall.h
+++ b/src/SciCall.h
@@ -207,10 +207,8 @@ DeclareSciCallV2(SetElementColour, SETELEMENTCOLOUR, int, element, COLORALPHAREF
 DeclareSciCallR1(GetElementColour, GETELEMENTCOLOUR, COLORALPHAREF, int, element);
 DeclareSciCallR1(GetElementBaseColour, GETELEMENTBASECOLOUR, COLORALPHAREF, int, element);
 DeclareSciCallV1(ResetElementColour, RESETELEMENTCOLOUR, int, element);
-//SCI_GETELEMENTISSET(int element) → bool 
-//SCI_GETELEMENTALLOWSTRANSLUCENT(int element) → bool 
-//SCI_GETELEMENTBASECOLOUR(int element) → colouralpha
-
+DeclareSciCallR1(GetElementIsSet, GETELEMENTISSET, bool, int, element);
+DeclareSciCallR1(GetElementAllowsTranslucent, GETELEMENTALLOWSTRANSLUCENT, bool, int, element);
 
 //  Selection, positions and information
 DeclareSciCallR0(GetReadOnly, GETREADONLY, bool);
diff --git a/src/Styles.c b/src/Styles.c
index 6d89ce6fa..8a4553b49 100644
--- a/src/Styles.c
+++ b/src/Styles.c
@@ -1477,17 +1477,22 @@ void Style_SetLexer(HWND hwnd, PEDITLEXER pLexNew)
         SciCall_SetElementColour(SC_ELEMENT_SELECTION_TEXT, RGBxA(rgb, SC_ALPHA_OPAQUE));
         SciCall_SetElementColour(SC_ELEMENT_SELECTION_ADDITIONAL_TEXT, RGBxA(rgb, SC_ALPHA_OPAQUE));
     } else {
-        SciCall_SetElementColour(SC_ELEMENT_SELECTION_TEXT, RGBxA(0, SC_ALPHA_OPAQUE));
-        SciCall_SetElementColour(SC_ELEMENT_SELECTION_ADDITIONAL_TEXT, RGBxA(0, SC_ALPHA_OPAQUE));
+        SciCall_ResetElementColour(SC_ELEMENT_SELECTION_TEXT);
+        SciCall_ResetElementColour(SC_ELEMENT_SELECTION_ADDITIONAL_TEXT);
     }
 
     rgb = RGB(0xC0, 0xC0, 0xC0);
-    Style_StrGetColor(pCurrentStandard->Styles[STY_SEL_TXT].szValue, BACKGROUND_LAYER, &rgb, true); // selection back
-    iValue = SC_ALPHA_OPAQUE;
-    Style_StrGetAlpha(pCurrentStandard->Styles[STY_SEL_TXT].szValue, &iValue, true);
-    SciCall_SetSelectionLayer(SC_LAYER_UNDER_TEXT);
-    SciCall_SetElementColour(SC_ELEMENT_SELECTION_BACK, RGBxA(rgb, iValue));
-    SciCall_SetElementColour(SC_ELEMENT_SELECTION_ADDITIONAL_BACK, RGBxA(rgb, iValue*2/3));
+    SciCall_SetSelectionLayer(SC_LAYER_UNDER_TEXT); // selection back
+    if (Style_StrGetColor(pCurrentStandard->Styles[STY_SEL_TXT].szValue, BACKGROUND_LAYER, &rgb, true)) { 
+        iValue = SC_ALPHA_OPAQUE;
+        Style_StrGetAlpha(pCurrentStandard->Styles[STY_SEL_TXT].szValue, &iValue, true);
+        SciCall_SetElementColour(SC_ELEMENT_SELECTION_BACK, RGBxA(rgb, iValue));
+        SciCall_SetElementColour(SC_ELEMENT_SELECTION_ADDITIONAL_BACK, RGBxA(rgb, iValue * 2 / 3));
+    }
+    else {
+        SciCall_ResetElementColour(SC_ELEMENT_SELECTION_BACK);
+        SciCall_ResetElementColour(SC_ELEMENT_SELECTION_ADDITIONAL_BACK);
+    }
 
     // selection eolfilled
     bFlag = Style_StrHasAttribute(pCurrentStandard->Styles[STY_SEL_TXT].szValue, FontEffects[FE_EOLFILLED]);
@@ -1495,11 +1500,24 @@ void Style_SetLexer(HWND hwnd, PEDITLEXER pLexNew)
 
     // whitespace colors
     rgb = RGB(0, 0, 0);
-    Style_StrGetColor(pCurrentStandard->Styles[STY_WHITESPACE].szValue, FOREGROUND_LAYER, &rgb, false);
-    SciCall_SetElementColour(SC_ELEMENT_WHITE_SPACE, RGBxA(rgb, SC_ALPHA_OPAQUE/2));
+    if (Style_StrGetColor(pCurrentStandard->Styles[STY_WHITESPACE].szValue, FOREGROUND_LAYER, &rgb, false)) {
+        iValue = SC_ALPHA_OPAQUE;
+        Style_StrGetAlpha(pCurrentStandard->Styles[STY_WHITESPACE].szValue, &iValue, true);
+        SciCall_SetElementColour(SC_ELEMENT_WHITE_SPACE, RGBxA(rgb, iValue));
+    }
+    else {
+        SciCall_ResetElementColour(SC_ELEMENT_WHITE_SPACE);
+    }
 
-    Style_StrGetColor(pCurrentStandard->Styles[STY_WHITESPACE].szValue, BACKGROUND_LAYER, &rgb, true);
-    SciCall_SetElementColour(SC_ELEMENT_WHITE_SPACE_BACK, RGBxA(rgb, SC_ALPHA_OPAQUE));
+    rgb = RGB(0, 0, 0);
+    if (Style_StrGetColor(pCurrentStandard->Styles[STY_WHITESPACE].szValue, BACKGROUND_LAYER, &rgb, true)) {
+        //iValue = SC_ALPHA_TRANSPARENT;
+        //~Style_StrGetAlpha(pCurrentStandard->Styles[STY_WHITESPACE].szValue, &iValue, false); ~ always opaque, no translucency possible in Win32
+        SciCall_SetElementColour(SC_ELEMENT_WHITE_SPACE_BACK, RGBxA(rgb, SC_ALPHA_OPAQUE));
+    }
+    else {
+        SciCall_ResetElementColour(SC_ELEMENT_WHITE_SPACE_BACK);
+    }
 
     // whitespace dot size
     iValue = 2;
diff --git a/src/TypeDefs.h b/src/TypeDefs.h
index 00b7bef98..f041a0492 100644
--- a/src/TypeDefs.h
+++ b/src/TypeDefs.h
@@ -104,8 +104,8 @@ extern WININFO g_DefWinInfo;
 //-typedef DWORD COLORREF;
 typedef int COLORALPHAREF;
 //-#define RGB(r, g, b) ((COLORREF)(((BYTE)(r) | ((WORD)((BYTE)(g)) << 8)) | (((DWORD)(BYTE)(b)) << 16)))
-#define RGBA(r, g, b, a) ((COLORALPHAREF)(((BYTE)(r) | ((WORD)((BYTE)(g)) << 8)) | (((DWORD)(BYTE)(b)) << 16) | (((DWORD)(BYTE)(a)) << 24)))
-#define RGBxA(rgb, a) ((COLORALPHAREF)(((DWORD)(rgb)&0xffffff) | (((DWORD)(BYTE)(a)) << 24)))
+#define RGBA(r, g, b, a) ((COLORALPHAREF)(((BYTE)(((r)&0xff)) | ((WORD)((BYTE)((g)&0xff)) << 8)) | (((DWORD)(BYTE)((b)&0xff)) << 16) | (((DWORD)(BYTE)((a)&0xff)) << 24)))
+#define RGBxA(rgb, a) ((COLORALPHAREF)(((DWORD)((rgb)&0xffffff)) | (((DWORD)(BYTE)((a)&0xff)) << 24)))
 //-#define GetRValue(rgba) (LOBYTE(rgba))                 
 //-#define GetGValue(rgba) (LOBYTE(((WORD)(rgba)) >> 8))
 //-#define GetBValue(rgba) (LOBYTE((rgba) >> 16))