diff --git a/CHANGELOG.md b/CHANGELOG.md
index 51cf9f5..d906ead 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+2.3.2
+-------
+
+- Change Yellow and Green colors to Pink and Deep Purple to pass WCAG 2.0's contrast test
+
 2.3.1
 -------
 
diff --git a/ext/rucaptcha/colors.h b/ext/rucaptcha/colors.h
index 840bf98..f4a633d 100644
--- a/ext/rucaptcha/colors.h
+++ b/ext/rucaptcha/colors.h
@@ -78,41 +78,41 @@ static char *colors[] = {
   "\x29\x62\xFF"
   "\xff\xff\xff" "," "\0\0\0\0" "\xc8\0\x46\0" "\0" "\x04",
 
-  // Green A700 #00C853
+  // Pink A700 #C51162
   "GIF89a" "\xc8\0\x46\0" "\x83" "\0\0"
-  "\x00\xC8\x53"
-  "\x00\xC8\x53"
-  "\x00\xC8\x53"
-  "\x00\xC8\x53"
-  "\x00\xC8\x53"
-  "\x00\xC8\x53"
-  "\x00\xC8\x53"
-  "\x00\xC8\x53"
-  "\x00\xC8\x53"
-  "\x00\xC8\x53"
-  "\x00\xC8\x53"
-  "\x00\xC8\x53"
-  "\x00\xC8\x53"
-  "\x00\xC8\x53"
-  "\x00\xC8\x53"
+  "\xC5\x11\x62"
+  "\xC5\x11\x62"
+  "\xC5\x11\x62"
+  "\xC5\x11\x62"
+  "\xC5\x11\x62"
+  "\xC5\x11\x62"
+  "\xC5\x11\x62"
+  "\xC5\x11\x62"
+  "\xC5\x11\x62"
+  "\xC5\x11\x62"
+  "\xC5\x11\x62"
+  "\xC5\x11\x62"
+  "\xC5\x11\x62"
+  "\xC5\x11\x62"
+  "\xC5\x11\x62"
   "\xff\xff\xff" "," "\0\0\0\0" "\xc8\0\x46\0" "\0" "\x04",
 
-  // Yellow A700 #FFD600
+  // Deep Purple A700 #6200EA
   "GIF89a" "\xc8\0\x46\0" "\x83" "\0\0"
-  "\xFF\xD6\x00"
-  "\xFF\xD6\x00"
-  "\xFF\xD6\x00"
-  "\xFF\xD6\x00"
-  "\xFF\xD6\x00"
-  "\xFF\xD6\x00"
-  "\xFF\xD6\x00"
-  "\xFF\xD6\x00"
-  "\xFF\xD6\x00"
-  "\xFF\xD6\x00"
-  "\xFF\xD6\x00"
-  "\xFF\xD6\x00"
-  "\xFF\xD6\x00"
-  "\xFF\xD6\x00"
-  "\xFF\xD6\x00"
+  "\x62\x00\xEA"
+  "\x62\x00\xEA"
+  "\x62\x00\xEA"
+  "\x62\x00\xEA"
+  "\x62\x00\xEA"
+  "\x62\x00\xEA"
+  "\x62\x00\xEA"
+  "\x62\x00\xEA"
+  "\x62\x00\xEA"
+  "\x62\x00\xEA"
+  "\x62\x00\xEA"
+  "\x62\x00\xEA"
+  "\x62\x00\xEA"
+  "\x62\x00\xEA"
+  "\x62\x00\xEA"
   "\xff\xff\xff" "," "\0\0\0\0" "\xc8\0\x46\0" "\0" "\x04"
 };