diff --git a/lib/src/interfaces/color.ts b/lib/src/interfaces/color.ts
index b19c5db..abeafde 100644
--- a/lib/src/interfaces/color.ts
+++ b/lib/src/interfaces/color.ts
@@ -2,4 +2,5 @@ export interface IRgbColor {
   r: number;
   g: number;
   b: number;
+  a: number;
 }
diff --git a/lib/src/package.json b/lib/src/package.json
index 0e5fb3b..bd91eee 100644
--- a/lib/src/package.json
+++ b/lib/src/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@gxc-solutions/renderer-base",
-  "version": "0.0.8",
+  "version": "0.0.9",
   "main": "index.js",
   "author": "GXC Solutions",
   "publishConfig": {