The Witcher wiki now has a light themed alternative for the wiki skin. To check it out, go to Special:Preferences, then choose the "Appearance" tab and click on the radio button next to "Hydra".
Please take a moment to fill out this survey on your gaming habits!
Though silver dragons were not mentioned when Geralt were listing the existing dragon species to Borch in The Pensive Dragon, they at least appear in art, like the one embroidered on Declan Ros aep Maelchlad's doublet.
One of Saskia's skins was named "silver dragon scales".