  Centaurs with high orbital inclinations and perihelia (i > 60 degrees; q >=
15 au) are a small group of poorly understood minor planets that are predicted
to enter the giant planet region of the Solar System from the inner Oort Cloud.
As such they are one of the few samples of relatively unaltered Oort Cloud
material that can currently be directly observed. Here we present two new
reflectance spectra of one of the largest of these objects, 2012 DR30, in order
to constrain its color and surface composition. Contrary to reports that 2012
DR30 has variable optical color, we find that consistent measurements of its
spectral gradient from most new and published datasets at 0.55-0.8 micron agree
with a spectral gradient of S ~ 10+/-1 %/0.1 micron within their uncertainties.
The spectral variability of 2012 DR30 at Near-UV/blue and Near-Infrared
wavelengths, however, is still relatively unconstrained; self-consistent
rotationally resolved followup observations are needed to characterise any
spectral variation in those regions. We tentatively confirm previous detections
of water ice on the surface of 2012 DR30 , and also consistently observe a
steady steepening of the gradient of its spectrum from wavelengths of around
0.6 micron towards Near-UV wavelengths. Plausible surface materials responsible
for the observed reddening may include ferric oxides contained within
phyllosilicates, and aromatic refractory organics.
