Here are the links to previously held Eurographics conferences :
eurographics2017.fr, eurographics2016.pt, eurographics2015.ch, eg2014.unistra.fr
These websites include the previous logos, which must include the letters EG. Additionally, the logo could incorporate the year 2018 or 18, and potentially the whole name Eurographics and the edition (39th Eurographics conference). The new logo should be less messy than the 2017 one, and have a connection with the city of Delft, the Netherlands and/or the host faculty TU Delft.
As for dominant colors, we envisioned a mix between 2 colors (any proportions is fine):
Cyan #00A6D6, for a reminder of the host university TU Delft (tudelft.nl)
Orange #FF4F00, the national color of the Netherlands
The website (and potentially the logo) should clearly state that the conference is hosted in the city of Delft, The Netherlands or/and at the university of TU Delft. Delft is famous for its canals, blue pottery, church and close association with the Dutch royal family. TU Delft is usually represented by its landmark buildings such as the library or the high-rise building (see attached pictures). Hence website colors and illustrations should refer to the conference environment.
About the attached pictures: we are not sure if you can see the names of the pictures. If not, let's just say that there are pictures of the city of Delft, pictures of the faculty and additional logos (TU Delft, and previous EG conferences 217 and 2016 including simple logo and extended banners)