make sure we got the right alpha value when parsing from hex

Author: rbri

src/main/java/com/gargoylesoftware/css/parser/AbstractCSSParser.java

@@ -816,7 +816,7 @@ else if (len == 4) {
                 g = (g << 4) | g;
                 b = (b << 4) | b;
                 ai = (ai << 4) | ai;
-                a = ai / 255d;
+                a = ai / 2.55d;
             }
             else if (len == 6) {
                 r = Integer.parseInt(t.image.substring(i + 0, i + 2), 16);
@@ -828,7 +828,7 @@ else if (len == 8) {
                 g = Integer.parseInt(t.image.substring(i + 2, i + 4), 16);
                 b = Integer.parseInt(t.image.substring(i + 4, i + 6), 16);
                 final int ai = Integer.parseInt(t.image.substring(i + 6, i + 8), 16);
-                a = ai / 255d;
+                a = ai / 2.55d;
             }
             else {
                 final String pattern = getParserMessage("invalidColor");

src/test/java/com/gargoylesoftware/css/parser/CSS3ParserTest.java

@@ -1016,6 +1016,18 @@ public void rgbInsideFunction() throws Exception {
         color("color: foo(rgb(204, 221, 68))", "color: foo(#cd4);");
     }
 
+    /**
+     * @throws Exception in case of failure
+     */
+    @Test
+    public void hexAndRgbAreSame() throws Exception {
+        color("color: rgb(138, 43, 226)", "color: rgb(138,43,226);");
+        color("color: rgb(138, 43, 226)", "color: #8A2BE2;");
+
+        color("color: rgba(138, 43, 226, 80)", "color: rgba(138,43,226, 80);");
+        color("color: rgba(138, 43, 226, 80)", "color: #8A2BE2CC;");
+    }
+
     /**
      * @throws Exception in case of failure
      */