update project description and translation

data/com.github.ronnydo.colorpicker.appdata.xml

@@ -26,7 +26,7 @@
   <url type="homepage">https://github.com/RonnyDo/ColorPicker</url>
   <url type="bugtracker">https://github.com/RonnyDo/ColorPicker/issues</url>
   <custom>
-     <value key="x-appcenter-color-primary">#91D5FF</value>
+     <value key="x-appcenter-color-primary">#A3FF91</value>
      <value key="x-appcenter-color-primary-text">#333333</value>
   </custom>
 </component>