Livery - all over navy railcar blue with GNR; what looks like a thin single red and white line along the middle. Lettering and numerals shaded red and gold.
From about 1959, CIE light green, unlined, no snail; renumbered from GNR's 800 to CIE's K801.
After about 1962, it obtained all over black with white lines round the tops of the bonnets. K801 in standard CIE font and size on cab sides, with CIE roundels on longer bonnet sides. Never had tan bits.