How to change the text in the "new articles" button?

Hi Hristo !
To change the text of the “new articles” button in the DW Focus theme, You can open the functions.php file. Find the line 885 and change the language there.
If you want to change color for the “new articles” button, You can log in to Dashboard > Appearance > Customize > General Settings > Add the following code to the “Header Script”

 <style>
.desktop .top-news {
     background: #...;
}
.desktop .top-news > a {
    color: #..... !important;

}
</style>

Hope this helps !