This theme is a variation of my other Workbench 1.3 theme, and includes some icons that mirror the original ones, and others modified to fit the functions they are meant to represent.
In any case all the icons have been redrawn with Inkscape, and exported in the Plain SVG format.
The available icons cover the Navigation bar, the Status Bar and the side Panel, while for Mail only those for Reload and Trash are replaced, while the others remain the original Vivaldi icons.
In this theme the prevailing color is the blue of the workbench, and the title bar is black, however if you wish you can make it white, thus giving it a more similar look to the workbench, simply by entering the theme modification options, and changing the "Accent" color in the Colours section.
PS: Sorry for my English :)