Plank, the band’s guitar tech, makes all of their guitar and patch cables using Switchcraft 1/4” plugs and VDC Oxygen-Free instrument cable. It’s listed on Jonny’s effects page. The green is just tape, used to make the cable easier to identify.
The tape-wrapped Switchcraft plug can be seen clearly in this photo from Victoria Park on June 25, 2008 (Neil Lupin).
A photo of Jonny’s pedalboard at Radiohead’s 2010 Haiti Benefit show. Note the orange tape used to indicate the cable connecting the BOSS LS2′s channel B to the BOSS OD3′s input, and also the yellow tape used for the Akai Headrush’s connections.