@5er: For translation you need to create .po and .mo files using free software from poedit.net. Once you are done let me know and I will email you the details. We can also add this translation in core theme. You can see other language which our user have contributed in your theme languages directory.
For color, you can change the color code in the following css and then add it in “Appearance => Theme Options => Custom CSS” box:
.paging-navigation a {
color: #7c9b30;
}
.post-navigation a {
color: #7c9b30;
}