Parin can be used from C.

.closed

@@ -0,0 +1,17 @@
+# This file is used by: https://github.com/Kapendev/closed
+
+[default]
+-t=lib
+-L=-lraylib
+# TODO: Make -J=source work by default maybe.
+-J=source
+-D=-betterC
+# Those lines work for me. Use -s=custom to fix any errors.
+-I=../joka/source
+-L=-L../raylib/lib
+
+[custom]
+-t=lib
+-L=-lraylib
+-J=source
+-D=-betterC

source/parin/ui.d

@@ -40,14 +40,14 @@ enum UiDragLimit: ubyte {
 
 struct UiOptions {
     FontId font = FontId();
-    Color fontColor = white;
+    Rgba fontColor = white;
     ubyte fontScale = 1;
     ubyte fontAlphaOffset = defaultUiFontAlphaOffset;
 
-    Color disabledColor = defaultUiDisabledColor;
-    Color idleColor = defaultUiIdleColor;
-    Color hotColor = defaultUiHotColor;
-    Color activeColor = defaultUiActiveColor;
+    Rgba disabledColor = defaultUiDisabledColor;
+    Rgba idleColor = defaultUiIdleColor;
+    Rgba hotColor = defaultUiHotColor;
+    Rgba activeColor = defaultUiActiveColor;
 
     Alignment alignment = Alignment.center;
     short alignmentOffset = 0;