webterm: adjust tile color
Fixes urbit/landscape#1167.
:~ title+'Web Terminal'
info+'A web interface for dill, through herm.'
- color+0xff.ffff
+ color+0x2e.4347
glob-http+'https://bootstrap.urbit.org/glob-0v4.8ui32.ui10d.t0v4d.n9g1s.1ftua.glob'
base+'webterm'
version+[0 0 1]
