Dex uses the form of a "squircle" for most of its icons. This is reminiscent of the famous theme Ubuntu Suru. Suru uses your container to embed icons and fancy icons, but Dex uses high contrast logos and images of high quality.
The result is a cleaner, more austere appearance, which remains a colorful character. Even such icons that all topics seem alien, such as Blender, Chrome the theme looks great Dex. Well, the native (e.g., VLC, Firefox) — those that use the contours of the frame (e.g., Dolphin, Settings) just join the highly contrasting design.
Theme developed for the KDE Plasma 5 (it is not the fact that it will work on GTK desktop) and is available for download from the KDE store.
1. Download the archive
May the Force be with you,