diff --git a/draw_context.cpp b/draw_context.cpp
index d91f540..66b7b27 100644
--- a/draw_context.cpp
+++ b/draw_context.cpp
@@ -13,19 +13,21 @@ namespace Cairo
     }
     void DrawContext::fill(color_space r, color_space g, color_space b, color_space a)
     {
-        save();
-        cairo_set_source_rgba (ctx_, r, g, b, a);
+        save();
+        cairo_set_source_rgba(
+            ctx_,
+            static_cast <double> (r) / colorMax,
+            static_cast <double> (g) / colorMax,
+            static_cast <double> (b) / colorMax,
+            static_cast <double> (a) / colorMax
+        );
         cairo_set_operator(ctx_, CAIRO_OPERATOR_SOURCE);
         cairo_paint(ctx_);
         restore();
     }
     void DrawContext::fill(RGBA color)
     {
-        save();
-        cairo_set_source_rgba (ctx_, color.r, color.g, color.b, color.a);
-        cairo_set_operator(ctx_, CAIRO_OPERATOR_SOURCE);
-        cairo_paint(ctx_);
-        restore();
+        fill(color.r, color.g, color.b, color.a);
     }
     void DrawContext::save()
     {