diff --git a/engine/client/cl_font.c b/engine/client/cl_font.c
index 1d8547d2..1f46d566 100644
--- a/engine/client/cl_font.c
+++ b/engine/client/cl_font.c
@@ -173,7 +173,7 @@ static int CL_CalcTabStop( const cl_font_t *font, int x )
 	return stop;
 }
 
-int CL_DrawCharacter( float x, float y, int number, rgba_t color, cl_font_t *font, int flags )
+int CL_DrawCharacter( float x, float y, int number, const rgba_t color, cl_font_t *font, int flags )
 {
 	wrect_t *rc;
 	float w, h;
@@ -231,7 +231,7 @@ int CL_DrawCharacter( float x, float y, int number, rgba_t color, cl_font_t *fon
 	return font->charWidths[number];
 }
 
-int CL_DrawString( float x, float y, const char *s, rgba_t color, cl_font_t *font, int flags )
+int CL_DrawString( float x, float y, const char *s, const rgba_t color, cl_font_t *font, int flags )
 {
 	rgba_t current_color;
 	int draw_len = 0;
@@ -287,7 +287,7 @@ int CL_DrawString( float x, float y, const char *s, rgba_t color, cl_font_t *fon
 	return draw_len;
 }
 
-int CL_DrawStringf( cl_font_t *font, float x, float y, rgba_t color, int flags, const char *fmt, ... )
+int CL_DrawStringf( cl_font_t *font, float x, float y, const rgba_t color, int flags, const char *fmt, ... )
 {
 	va_list va;
 	char buf[MAX_VA_STRING];
diff --git a/engine/client/client.h b/engine/client/client.h
index 705a6571..221ad125 100644
--- a/engine/client/client.h
+++ b/engine/client/client.h
@@ -807,11 +807,11 @@ qboolean Con_LoadFixedWidthFont( const char *fontname, cl_font_t *font, float sc
 qboolean Con_LoadVariableWidthFont( const char *fontname, cl_font_t *font, float scale, convar_t *rendermode, uint texFlags );
 void CL_FreeFont( cl_font_t *font );
 void CL_SetFontRendermode( cl_font_t *font );
-int CL_DrawCharacter( float x, float y, int number, rgba_t color, cl_font_t *font, int flags );
-int CL_DrawString( float x, float y, const char *s, rgba_t color, cl_font_t *font, int flags );
+int CL_DrawCharacter( float x, float y, int number, const rgba_t color, cl_font_t *font, int flags );
+int CL_DrawString( float x, float y, const char *s, const rgba_t color, cl_font_t *font, int flags );
 void CL_DrawCharacterLen( cl_font_t *font, int number, int *width, int *height );
 void CL_DrawStringLen( cl_font_t *font, const char *s, int *width, int *height, int flags );
-int CL_DrawStringf( cl_font_t *font, float x, float y, rgba_t color, int flags, const char *fmt, ... ) FORMAT_CHECK( 6 );
+int CL_DrawStringf( cl_font_t *font, float x, float y, const rgba_t color, int flags, const char *fmt, ... ) FORMAT_CHECK( 6 );
 
 
 //
@@ -1107,7 +1107,7 @@ int Con_UtfMoveRight( char *str, int pos, int length );
 void Con_DefaultColor( int r, int g, int b, qboolean gameui );
 cl_font_t *Con_GetCurFont( void );
 cl_font_t *Con_GetFont( int num );
-int Con_DrawString( int x, int y, const char *string, rgba_t setColor ); // legacy, use cl_font.c
+int Con_DrawString( int x, int y, const char *string, const rgba_t setColor ); // legacy, use cl_font.c
 void GAME_EXPORT Con_DrawStringLen( const char *pText, int *length, int *height ); // legacy, use cl_font.c
 void Con_CharEvent( int key );
 void Key_Console( int key );
diff --git a/engine/client/console.c b/engine/client/console.c
index 307d8e83..45bd2750 100644
--- a/engine/client/console.c
+++ b/engine/client/console.c
@@ -759,7 +759,7 @@ Con_DrawString
 client version of routine
 ====================
 */
-int Con_DrawString( int x, int y, const char *string, rgba_t setColor )
+int Con_DrawString( int x, int y, const char *string, const rgba_t setColor )
 {
 	return CL_DrawString( x, y, string, setColor, con.curFont, FONT_DRAW_UTF8 );
 }
diff --git a/engine/ref_api.h b/engine/ref_api.h
index b9d865a6..a5719b42 100644
--- a/engine/ref_api.h
+++ b/engine/ref_api.h
@@ -348,7 +348,7 @@ typedef struct ref_api_s
 	void	(*Con_NXPrintf)( struct con_nprint_s *info, const char *fmt, ... ) FORMAT_CHECK( 2 );
 	void	(*CL_CenterPrint)( const char *s, float y );
 	void (*Con_DrawStringLen)( const char *pText, int *length, int *height );
-	int (*Con_DrawString)( int x, int y, const char *string, rgba_t setColor );
+	int (*Con_DrawString)( int x, int y, const char *string, const rgba_t setColor );
 	void	(*CL_DrawCenterPrint)( void );
 
 	// entity management